Mercedes Benz A/C Not Cold! Watch Out For This Hose!

2008 Mercedes Benz E350 with an a/c system not working. Non-recall suction side a/c hose internal failure is the cause. Low side readings of 60 psi or higher. Mercedes Benz is aware of this failure.
Vehicles Affected: A-Class 169, B-Class 245, C-Class 203, C-Class 204, CL 216, CLK 207, CLK 209, CLS 219, E-Class 211, E-Class 212, GL 164, GLK 204, M-Class 164, R-Class 251, S-Class 221, SL 230 and SLK 171
These are a couple links to the spring lock coupler tool.
www.ecstuning....
www.fcpeuro.co...

[@mariocuadra1826]

A hose that collapses internally; that is just beyond what most people would suspect. Thank you for another good video with your automotive experience weighing in on a problem that is lurking beneath the surface for many Mercedes owners.

[@Cubanita1sensual]

Thank You! I always forget to check the bulletins. They only notified when it's a Recall & not on Bullentins. Thank You!

[@InitechAuto]

Happy to help!

[@katzfinch]

Nicola, Thank you for making this! And THANKS for figuring this out! We just had our 2008 wagon in the shop for air-conditioning issues. I started to drive the car home and I thought to myself it’s not cold enough. I drove it a little bit more and didn’t get much colder so I turned around. Our non-dealer Mercedes mechanic had it for another few days and could not find anything wrong with it. He went over with us every single thing that he had done. Since I know that they knew what they were doing I couldn’t question them. They did the right thing. And I knew that I wasn’t crazy. So I thought to myself there has got to be something else… I kept on thinking that. After a couple of research I ran into your video and I cannot thank you enough. They have the part on order and we’re glad to have a found out about the mystery. Thank you again!

[@InitechAuto]

I hope it works out for you. Just remember your mechanic should have seen an unusual reading on the low side of the a/c system. That's the dead giveaway. It should be around 30 to 40 PSI on the low side. Once you fill the system to its proper level it should work. If you're still having problems. Check you blend doors in the HVAC system to make sure they are working correctly.

[@katzfinch]

@@InitechAuto Will do and thank you!

[@ontheball247]

@@InitechAuto Hi. What do you mean by blend doors? Thanks.

[@InitechAuto]

@@ontheball247 When you change your temp settings. That is what moves to adjust for your desired temp. They are controlled by actuators. These items are inside the dash.

[@ontheball247]

@@InitechAuto Thank you for the knowledge. If you've used the tool before, do you know how it works? Or know of a work around? I've posted this question on the video, but on a bit of a time restraint, otherwise I would just be getting mercedes to do the job, but they can't see me till next week at the moment

[@victorduque8433]

Had this air conditioning problem for about 8 months now and looked everywhere in the car couldnt figure it out. Gonna change this hose I already know it’ll save my life amazing video

[@user-wm9xk9ub4t]

it works?

[@HighDef414]

Sooooo... Did it work? Lol

[@georgespurlock5547]

Bump😂

[@TheRacerRich]

Without you/the TSB I never would have solved this.

[@joedavis8043]

I had that exact same problem on a 2008 GL450. On mine, that hose runs very close to the exhaust manifold, which may have contributed to its premature failure. When I replaced it, I added some header insulation around the hose and secured with some stainless wire ties I found at NAPA.

[@MrMarco6900]

Just know that could save countless hours of troubleshooting! Thanks.

[@playstation1331]

love these E classes

[@edwardandrade4390]

Thank you. I, too, had this happen to my Benz. Not after replacing many things, including the compressor

[@ontheball247]

In case this helps any one... and please, read this to the end before starting any of it, if you wish to try this (at your own risk), as it does work, but needs to be done a certain way, and with 2 people. I used long, thin centre punches to slowly push in the pins (at 3 and 9 o clock on the coupler), which made 2 more pins (at 6 and 12 o clock) push out of the coupler. I pushed in (not too hard) until I saw that the pins at 6 and 12 o clock weren't coming out any more. Then, while I held the pins in, my awesome mechanic (admittedly this worked because of his experience...and this is the tricky bit) used long needle nose pliers to lightly grab the pipe just before it enters the coupler, and slowly and gently wiggled the pipe out of the fitting. Then the part I actually found difficult was getting the 6mm allen key bit onto the lower bolt and breaking it free with the tight space I had, right next to the hot engine and exhaust manifold (if you also do this with a hot engine, I believe you too, will burn your hands. Lol). I hope this helps someone. But please remember to be slow and gentle when pushing in the pins, and wiggling the pipe out.

[@armyman1134]

This really helped me. Thanks from 2022.

[@sarahrose220]

Mercedes from RICHMOND quote for my 2012 CL550 with 33,000 Km for this issue. To replace the AC hose, we will need to access the AC Compressor. The job involves dropping the subframe as there is limited space. Germany parts are 2-3 weeks away. We can release the vehicle & return for the work when the parts arrive. In the picture, the AC hose have condensation, that is normal condensation as the AC hose is cold. Labor time is approx. 13hrs ($2665) REFRIGERANT LINE - $280 - GERMANY SPACER RING - $8 - GERMANY SEALING RING - $13 - IN STOCK Refrigerant $400 + Alignment $290= $690 Total : $3656+taxes

[@InitechAuto]

Ouch, that is very painful.

[@sarahrose220]

Yeah no kidding. They need to drop the engine to change an AC hose? You'd think Mercedes having had AC issues going back to the 80's would make this more accessible.. Is there a hose that can be rerouted somewhere else possibly?

[@InitechAuto]

@@sarahrose220 That price just seems outrageous. I really think you should get a second opinion from a Mercedes mechanic other than the dealer. Unfortunately, I could not find any info on what it takes to replace the hoses from the A/C compressor for your vehicle.

[@pnwadventures2955]

Really good, thanks!

[@Jester123ish]

Imagine what the first person to discover this went through...

[@edwardandrade4390]

Yeah I believe this is helpful. But the location of this valve and hose mite as well be in a backhoe. A place I'd never get too. It may explain the 1,500 estimate.

[@mckoylach1622]

Thanks for the video,hope this is the problem that my friend has with his 2010 Mercedes….

[@gonzalomaureira6780]

Thank you Nicola!, w211 e 280 problem ac solved from Chile!

[@mrJanniekoen]

Thanks man, I have been having trouble with my C-class aircon. Took it to a airconditioning expert who wanted to charge me $ 2300 to replace everything. I'm going to have a look at it this weekend. Hopefully I can save thousands of dollars.

[@coldfinger459sub0]

Collapsed hoses are the worst frustrating when you discover it’s not the expansion valve. Or any other part.

[@ososcribww]

Your awesome brother I noticed the readings it is perfect

[@jessebrin731]

Thanks! Great tip. Be loads better if you explained how to avoid breaking that coupler that you said you broke.

[@Peter-it5ht]

I have a similar issue with my S211 it will not go below 10c/50f, it has been recently recharged with gas this pipe could be the issue but first I will change the sensor on the high pressure side of the system ,this sensor is a temp and pressure sensor,my code reader is saying the pressure side of the sensor is not working ,so this will be done first ,then I will have a look at this pipe , excellent video, thank you.

[@kukukon]

My GLK 250 stopped cooling suddenly today, I haven’t done anything yet but have very similar pressure reading. Will track down the hose tomorrow and start there. If this is the problem I can’t thank you enough.

[@sergiovaldez9718]

Greetings Nicola, Can you please identify the name of this part so I can order it from auto parts. I believe this video will help me solve my AC issue also can this be remove easily as mentioned?

[@robertturner4905]

Nicoya -Great video. One question - I noticed that the freon can during your refill was upside down.Most cans say to keep upright.Were you using something different or do you have a better technique. I rely on guys like you to help DIY guys like me. Thanks in advance of a response.

[@InitechAuto]

All manuals tell you to have the can in vapor mode (right side up). However, I hold it upside down to speed up the process of getting freon into the system. Large amounts of freon in liquid form can possibly damage the compressor, so I'm adding small amounts. I have never had any issues with this method myself.

[@muhammadnusrum6351]

For once I was praying my car was on that list 😭 sure enough 209 CLK

[@kwaisingng]

Sir very good teach

[@blue_death2146]

Same issues thankyou

[@ASK13saregreat]

Thanks for the insight!

[@agoodneighborautorepair2176]

Very nice explanation and information, blessings..

[@AMG5PT4]

This just happened to my 2009 W211 E63. Hose is NLA.

[@henrymaterla4709]

SUPER!.Th.Henry.

[@seamuswarren]

My 2009 CL200K is problematic too. 90% of the time the aircon is gutless and always when I most need it on a hot day. Yesterday I noticed cooled/conditioned air was coming through the front passenger the vents. Ambient air was coming through driver side vents.

[@InitechAuto]

Sounds like a blend door actuator problem.

[@therestorationshop]

Great video! I have a strange leak in my W211 system. It will hold a vacuum for hours but leaks refrigerant within hour of the next use. I put some dye in an I think this hose might be the source of the leak but I am puzzled by the fact that the system will hold a vacuum.

[@InitechAuto]

This hose is more of a performance issue. Most likely not the cause of your leak. Take a good look at your compressor seal.

[@3rkowtf669]

Great video, I see my 07 C230 is on that list as well, but mine has a weird problem where it would blow hot air on the passenger side at the same time cold air on the driver side, will look at that hose.

[@InitechAuto]

That would be a blend door issue. Check your A/C controls and actuators.

[@3rkowtf669]

@@InitechAuto will do, thank you much.

[@saintjohn316TV]

Thanks for this video. Hopefully this will solve my problem. I purchased the car in October and never knew the AC didn’t work until the first hit summer! Could you just give a tip on how to remove the end from the plastic coupler? You expressed the importance of not breaking it. It would be nice to have a heads up on the proper way to disconnect it. I figured if you broke it, I’m sure i will too.

[@InitechAuto]

I believe the tool you need is like this one. I did not have this tool and ended up breaking it. www.fcpeuro.com/products/mercedes-ac-low-side-coupler-remover-cta-tools-2763?ads_cmpid=352578559&ads_adid=22978217719&ads_matchtype=&ads_network=g&ads_creative=85228362199&ads_targetid=pla-70936742985&ttv=2&gclid=Cj0KCQjwlMaGBhD3ARIsAPvWd6i59yjk0F0JWjvCOOSLxKSg2XmLsFGCGgEy2eF6_jWVge9rAJWksNEaAsS6EALw_wcB

[@saintjohn316TV]

@@InitechAuto Ah thanks! I’m certain I would’ve broke now! Lol. I’ll order the tool now.

[@saintjohn316TV]

@@InitechAuto interesting. In the website it says it doesn’t fit the GL450. Maybe I’ll give them a call first.

[@LLF123]

I have similar symptoms with my 2013 x166, wondering if it is the same issue…

[@caxuxi1]

Ii have 2003 e320 base model for a while the ac sometimes works fine and sometimes doesn't, until last year suddenly stop working im not to good on ac but i been changing the compressors on my other cars on i connect the gauges but i don't remember the readings only what i remember is the car dont take no more freon and also i notice that the system has freon because the freon came out of the hoses and i press the valve and freon came out so that make me think that i have this problem with this hose. So maybe is very common with this cars, i have also gl550 2010 i owne this vehicle for the last past 6 years and after 1 year compressor stop working so i replace the common do the vacuum and wait for leaks and after 2 hours looks like everything was fine y recharge the system and works but after 1 year maybe start with the same issues like the e320 especially when is very hot the ac don't want to work properly, other this i notice is when i driving or i stop if i flooring the engine over 2500 or 3000 rpm the ac start working so my question is on both cars is possible tha i have the same problem

[@InitechAuto]

Look at your manifold gauge reading’s.They will tell you what’s going on.

[@michobebemckawi]

Just one point that was missed, how do you detach the hose from the coupling? What's the mechanism?

[@InitechAuto]

It's in the notes.

[@maherkhabbazeh4333]

Very impressive discovery about the collapsed hose. Was the radiator fan running on high speed even when you start the car after an overnight park ( cold engine) at the time you had a high psi reading at the low side? That is what my fan is doing on 07 e350 4matic.

[@InitechAuto]

To be honest. I don't recall if the fan was running on high. But it was on. Just look at your manifold gauges. Do you have more than usual high reading on the low side?

[@maherkhabbazeh4333]

Not on the manifold gauges but on my odb2 scanner it reads 116 psi when ac is running and 75 psi when ac is off. Scanner does not say if this is the low or high pressure line reading. In my case the ac is cold after adding a 12oz can of r134a. But the fan problem is a mystery that I’m trying to fix. I’m asking because someone suggested that a high pressure reading can trigger a fan running on full speed.

[@InitechAuto]

@@maherkhabbazeh4333 Turn the A/C off. If the fan stays on high. You might have a stuck relay. Good luck!

[@M113kAdil]

Had same issue, I replaced my coolant temperature sensor and I was sorted.

[@olivierhebert7125]

@@maherkhabbazeh4333 I don't know if it would help you, I'm really no expert. But I had the fan running at high speed when I pulled off the AC fuse.

[@orlandooliva9447]

I got the CTA 2763 tool to remove the hose. The question I have is once the tool clips on do I push out the hose or push back the tool and coupling? I don't want to break the tool or the coupling. Thanks for your help.

[@THEREALESTATEHUSTLER]

Thx man

[@dentalmanuk]

Another design flaw that's really haunting me is the location of cooling coil .if this goes bad then seems to dump the car ..no?

[@InitechAuto]

The evaporator core very rarely fails. I would not worry about it.

[@dentalmanuk]

@@InitechAuto hope so that coil doesnt go bad. So far ac working cool for 2 days.. hope it stays that way but If its leader then mechanic said coil might be leaking . God knows

[@InitechAuto]

@@dentalmanuk Might be? There is no such thing. It either leaks or it does not. No one should guess. Unless you like to throw money away. There are tools to help you find leaks.

[@shevanbryan3549]

Hey man, thanks for this video. I'm doing a similar repair on a 2008 S550. Before watching this video we could not get the low pressure hose off, so we destroyed the black coupler and the replacement hose comes with one on it. For some reason though, I cannot get it all the way on. It does not go up far enough (maybe just to the second O ring). Is there any special tool I should need to do this? The replacement hose is OEM, part number lines up and everything.

[@InitechAuto]

I was able to push mine right on.

[@mikaelcarlsson3981]

Are there a video on how to demount the upper plastic fitting

[@martinramirezmi5457]

my 2006 bmw 325i only blow out 70 degree air, nobody has been able to figure out what is causing it.

[@florincostache4563]

Hi, Thank you for your video I have ML 300 Cdi and having an issue with Ac. When it is hot, it is fine. But, for cooling. Left side is cooler than right which lasts only a minute and starts getting warmer. I have tried to top up ac But, mechanic guy said, it could be compressor which i belive that should be last thing yo be replaced as it may be smaller problem. Do you have any recommendation plz? Thanks

[@dr.akmakjan1283]

What about W205 is this effect too. October 2016 model a/c compress just stopped hybrid model C Class

[@InitechAuto]

I don't see that model on the list.

[@dr.akmakjan1283]

@@InitechAuto Could you tell me what this error code is? P261100 - The regulating vale for climate control has a malfunction. Do I need to change the air conditioner compressor? N3/10 and N127 all have the letter F on the xentry Diagnosis. program.

[@InitechAuto]

@@dr.akmakjan1283 Can't help you with that code. I have no idea. Take it to the dealer.

[@Firemk8R13]

Do you know the part number for this hose? I figured I might start here before I bring it in to the shop. Thank you.

[@InitechAuto]

Look it up by application. All new hoses are of the updated design.

[@darrellphillips3410]

Nicola, hi there I have a 2012 GL 550 I wasn’t able to get any cold air so I brought it to a AC mechanic and so far he has changed my compressor 6 weeks ago. The air was cold only for a day then I brought it back to him. Then he told me the fan was only working intermittently so he said I need a new fan. I bought a fan and he installed it. The air was again cold for a day. I brought it back to him and he crawled under the car and said he found the discharge hose line to be leaking. He ordered a new discharge line and installed. Once again the air worked only that day. Do you think this suction hose line to the compressor could be my issue?? Thanks for the video and answering my questions sir.

[@InitechAuto]

Sounds like you need a new mechanic. The issue with the hose in this video is that it would never work well. It would not be a intermitten problem. You just need a better mechanic to find and isolate your problem and stop throwing parts at it.

[@darrellphillips3410]

So you think he should replace this suction hose and see if that fixes the problem? Thanks again

[@darrellphillips3410]

Also what are the correct readings for the low and high side when the system is working properly.

[@darrellphillips3410]

Right now finding a new mechanic is not an option because my vehicle needs to be fixed and he has the car at his shop. I am waiting for him to call me and tell me what he thinks is the problem now.

[@InitechAuto]

@@darrellphillips3410 Check your manifold readings before coming to any conclusions. You have to diagnose the problem first.

[@cxy9670]

Hey thanks for the video. Been going crazy for 3 years and back and forth with dealer. Is there a link for the bulletin you found on MB website. Also what is the exact name of the hose so I can let the mechanic know. Thanks so much! Hopefully this will resolve the issue .

[@InitechAuto]

Suction side a/c hose @ compressor. Don't do the work for them. Tell them there is a bulletin on the subject. They can look it up themselves.

[@bizarrebroz3424]

@@InitechAuto problem is that they end up messing other things up coz they re too lazy to check how to, and end up just piling costs onto owners. If I'm using my non mb mechanic, I'd give them all the help i can. At mb itself they would just scoff and f it up further on purpose

[@jimbarger1241]

Excellent video and source of information. Thank you. I have a related AC question. 2008 GL 450. AC will work fine for hours then suddenly blow warm air. it can stay in the warm air condition for a day or two sometimes longer, then, it will work fine (bone chillin). It appears to be a control issue and less of a refrigerant issue. Any thoughts? Thanks again.

[@InitechAuto]

Make sure the evaporator is not freezing up. If it is, that would indicate a faulty expansion valve. That's what it sounds like to me by your description.

[@jimbarger1241]

@@InitechAuto Thank you, I will give that a try. Greatly appreciated.

[@seankellogg6154]

@@jimbarger1241 did you get your A/C figured out? I have same issue with my 2007 GL

[@NWCI]

This is very interesting, I have an intermittent AC issue with my 2009 c300 (w204). AC works great until it's hot outside (93f or above) and the car been parked under the sun for sometime then it just blow hot air and it doesn't command radiator fan to work faster, once the fan runs fast everything works great. If parked under the shade for like 30 minutes after that it works again 90% of the time. Any idea on what direction to look for? Thank you.

[@InitechAuto]

Try using a bi directional scanner. See if you can control the fan to go to 100%. Other than that I would probably suspect the fan itself. That definitely sounds like one of those tricky problems.

[@NWCI]

@@InitechAuto I was looking to buy one and test with it. Most mechanics around me don't worth a penny unfortunately.

[@InitechAuto]

@@NWCI If you find out what the problem is. Let me know. I’m curious myself.

[@farhanghafoor2369]

I have the same issue, the AC works sometimes and the fan is not engaging properly, the car also gets really warm however its not overheating

[@Betoardz]

Any luck with this one?? I think I have the same exact issue with a 2014 c180.

[@t3mtf8]

That coupler you said not to break... Any tips on getting it detached without breaking it?

[@InitechAuto]

you need a special disconnect tool. Here is the link. www.ecstuning.com/b-cta-tools-parts/mercedes-benz-a-c-low-side-coupler-wrench/cta2763~cta/?gclid=CjwKCAjwjJmIBhA4EiwAQdCbxj7HNsq9wMdzKqgbX6Ox8M4WxocOCpMKpZCuImRpIi6DIqBoxbK6txoCfQ4QAvD_BwE

[@singhsarabjit]

@@InitechAuto I am in the same boat now. Did you use that tool? How to use it? Thanks 😊

[@InitechAuto]

@@singhsarabjit I never used the tool. I broke the coupler and had to replace the hose. It looks pretty simple to use tho.

[@dentalmanuk]

Mine also not cold and went to mechanic he sort of cleared the entire system through a machine and then vacuumed system..added 6 bottles of oil and refrigerant.. now it's cold.. does it mean the problem is settled or might be some kind of leakage??

[@InitechAuto]

During the evacuation and recharging of the system. The mechanic should’ve checked for leaks at that time.

[@Sroor2023]

Wow Iam really surprised about this 😳😳😳

[@johncowley8882]

Taken my Mercedes A class for a a/c top up, but they say I have a leak in the system, have completely checked the system and I can see no leak, if the hose has collapsed would this show on air con dials the same as if the system has a air con leak?

[@InitechAuto]

No, the readings would be different. The collasped hose would strictly be a performance issue. Showing a high reading on the low side. While a leak would just show up as low readings.

[@johncowley8882]

@@InitechAuto Thank you so very much for your reply, will have a good look at the hoses, there must be a leak there somewhere. Once again many thanks.

[@claybornethabarber4179]

To take the hose off do I empty the Freon from the system or just take it the hose off while the cars off

[@InitechAuto]

Freon must be removed.

[@ontheball247]

Hi. I have this hose from Mercedes, ready to install. But I'm having trouble getting hold of this tool, and trying to get the job done today if possible. Does anyone know a work-around to this tool that has worked? Or know exactly how the tool disconnects this coupler? Thank you.

[@InitechAuto]

www.ecstuning.com/b-cta-tools-parts/mercedes-benz-a-c-low-side-coupler-wrench/cta2763~cta/?gclid=CjwKCAjw9aiIBhA1EiwAJ_GTSh29uoUCqnWZM8tvh07VO6MznGIKYPd48JnyYN8dJPlRq14_sfQFohoCshoQAvD_BwE www.fcpeuro.com/products/mercedes-ac-low-side-coupler-remover-cta-tools-2763?ads_cmpid=352578559&ads_adid=22978217719&ads_matchtype=&ads_network=g&ads_creative=85228362199&ads_targetid=pla-70936742985&ttv=2&gclid=CjwKCAjw9aiIBhA1EiwAJ_GTSuK0WUWgzlJBeWMic3iDS-JeJyrgCs0NWyESVGm5Y2Lko5aywOQ7gxoCONUQAvD_BwE

[@ontheball247]

@@InitechAuto thanks again. I was looking for a work around if possible though. Its just a time restraint, since I can just get someone to do it next week if I'm able to free up the time for that appointment. The delivery cost and time (to Canada) would mean waiting for this tool to arrive wouldn't be feasible for me. But looking at the images I have of the connector and the tool, it does seem like you just need to pinch the white tabs in and up, and then pull out the hose (I've used almost similar fittings in plumbing). Of course if someone with experience says thats a big no with this fitting, then I won't try it

[@kyleeski1]

How do you even get that fitting off with the special tool? For life of me I cannot seem to get it off.

[@InitechAuto]

I never had to use it since I broke my coupler.

[@tainchains]

Just thought I'd ask. My 2000 c280s air quit being cold this year. Blows only warm. I checked the compressor plug and it is not getting power. A/c has a full charge. I checked the compressor wire and no breaks. Would you say maybe the evaporator sensor switch? I checked the three fuses none were blown.

[@InitechAuto]

Check and see if the PCM is commanding the A/C relay to turn on. And of course, make the relay is good. How do you know the A/C has a full charge?

[@tainchains]

I rented gauges and hooked them up to the high and low ports. The readings fell within the fully charged parameters.

[@TheRazvancristian]

Hy mate,i have mercedes benz a class A170 ..a 2 months ago heating work without problems,when i comeback from holliday heating dont have power like before..come a little warm air inside the car but not like before,when was winter in 2 minute was warm in the car..you know what can be the problem?

[@InitechAuto]

Check your coolant level, thermostat, blower motor, and actuator controls for the heater.

[@johnnycage9914]

Will this issue cause the ac light to flash and the car not to take a recharge?

[@InitechAuto]

No

[@Lexus2691]

How could you have 70 psi if hose restricted the low side it should have had vacume reading

[@InitechAuto]

Not necessarily. That’s what makes this problem very unique. Go to the Mercedes website. And look up this hose. It explains what happens. I thought the same thing. And replaced the expansion valve because of the readings I was getting.

[@kenski0015]

Would that be for a 2013 C300 W204

[@AZ-mw4rs]

Hi 2008 GL550 here, got a new compressor 1 year ago. do you think it's part of the routine to change this hose too? Now, AC sometimes works and sometimes doesn't. Got vacuumed and recharged like 4 times in the past 2 months. Only 1.2 lbs R134a left while total should be 2.7 lbs. There should be a leak somewhere but one mechanic said it could be "hose saturation, not a leak" due to the expansion valve got stuck. They added dye bu quick looks did not find much (was traveling with a trailer). I'm new to this but the gauge readings seem not consistent. Sometimes it's 115 low and 200 high. sometimes it's 40 low and 125 high, etc. Can you point me to the right direction? Appreciate your help!

[@InitechAuto]

Sounds like you have a leak they have not found. "hose saturation, not a leak" That's a good one! Hose saturation is a leak. I would replace the hose in the video If you have one. If your pressures are still erratic I would try a new expansion valve.

[@AZ-mw4rs]

@@InitechAuto thanks for your quick response. Yes I was planning to replace this hose and expansion valve. BTW I just checked the pressures again and now, static 100 low 85 high. When engine on AC on, 96 low 85 high. Turn off AC, wait a bit, turn AC on, the low went down to about 90, them climbs back to 96ish quickly. Ambient temp was like 85-90F. I did get a recharge yesterday, and it worked for only 20 minutes. Is this an indication of a bad compressor? Or some sensor prevented the compressor to run?

[@InitechAuto]

@@AZ-mw4rs High side is way too low with the engine running. Should be around 185 to 200 PSI and low side should be around 40 PSI. Maybe your compressor did die.

[@DaRealA.T.G]

Might this work on my 96 s420 i changed the blower regulator and ac still doesnt work if so do you know any place to but the replacement hose

[@InitechAuto]

Your car will not have this hose.

[@tommyschreiber6883]

Wow

[@tainchains]

Is it possible to have this problem on a 2000 c280. My air quit and will not get cool on recharge. When purchased it air was not cool but recharge made it cool. I do not have this hose. I think mine is aluminum flex.

[@InitechAuto]

What are your manifold gauge readings?

[@tainchains]

Sorry I have not looked. I would have to go rent them. I just know I used to be able to recharge it and it would get cold. But now it makes no difference. I wondered if it might be that thing on the firewall. But no air anymore. It did work. And the it didn't.

[@bobgodd]

Did you happen to have the part number for the updated hose?

[@InitechAuto]

All the new replacement hoses will be updated. Part numbers will vary depending on the model of the vehicle.

[@samuelcaldwell8697]

@@InitechAuto 2010 gl550

[@InitechAuto]

@@samuelcaldwell8697 All the new hoses will be of the updated design. You have to look it up by vehicle application.

[@Ana88L]

3:09 how do you open black coupler without breaking?

[@InitechAuto]

With a special tool that I have linked in the video notes.

[@caxuxi1]

Part # for the hose please??????

[@InitechAuto]

All new hoses will be of the updated version. Look it up by your vehicle application.

[@GeorgeusGeraldo]

Hello, Sir. did the AC only feel cold on the right hand side, or both side not cold at all? i have problems that my left hand side AC is sometimes cold and sometimes not. might this issue caused by the same hose?

[@InitechAuto]

No, this hose would affect the whole system. What you are describing is a blend door problem.

[@GeorgeusGeraldo]

@@InitechAuto is blender door issue can decrease the freon Level? Got mine checked on the authorized service center, they said blend door having no issue, but the freon level is decreasing

[@InitechAuto]

@@GeorgeusGeraldo Top it off and see what happens. If the freon is decreasing then you have a leak.

[@GeorgeusGeraldo]

@@InitechAuto alright, will do another check on another service center. Really appreciate your help, Sir. Thank you

[@kliv-ng6uy]

I have a problem with my ac it blows cold but not cold enough do you think I have the same issue?

[@InitechAuto]

Try topping it off. Also check your pressures

[@YamaReal]

Is this only for 2008 not 2009? ML350

[@InitechAuto]

Look at your running pressures. If the low side is high, it is it possibility that you have this problem.

[@anthonypeterson5618]

Any error codes prior to replacing hose?

[@InitechAuto]

No codes. Just poor A/C performance.

[@diywithpeter]

Plz how did you remove the clip at the other enddbof the hose?

[@InitechAuto]

I ended up breaking mine by accident. There is a tool you need to buy to remove the coupler. The link for the tool is in the video description. Good luck!

[@jasonmoriset9292]

09 GL450. Is there a way to tell if the hose has already been replaced? Like, is there a color code or date code for the updated hose? I just charged the system up and it was only cool for a few seconds, then ambient temperature air.

[@InitechAuto]

Look at the list that is in the video. If you fall under that list I would just replace the hose. As far as I know, you can't tell. Also look at your manifold gauges.. what readings are you getting. That is the big FBI clue.

[@jasonmoriset9292]

@@InitechAuto I think that my first issue is to replace the compressor. About 120 on the high side and 70ish on the low side with a verified full charge. I noted the low side would cycle about 4-5psi up or down and near zero cold air.

[@InitechAuto]

@@jasonmoriset9292 Low side is too high. Should be around 30 to 40 psi.

[@jasonmoriset9292]

@@InitechAuto that's why I think the compressor is shot.

[@InitechAuto]

@@jasonmoriset9292 I don’t think a compressor would cause the low side to be that high. I think you have a partial restriction somewhere. Most likely be the hose in the video or the expansion valve.

[@anthonysilva8220]

Hello Nicoya i have a lovely MB CLS 320 cdi (219.322)Manufacture in 2006 (Chassis -WDD2193222A088331)- About 7 months ago i got my AC serviced by a garage and they topped up the System with R134A- now three days ago i noticed (Summer is hear and the temperature is getting warmer in Europe) the right hand side of the car the Air is warmer than the left hand side (my car is Right hand drive)and i do not have any warning on my dash about AC problems -do you know what could be wrong and what i should do any advice will be great

[@InitechAuto]

Sounds like you have a dual climate control system. Check your blend doors and actuators for proper operation.

[@anthonysilva8220]

@@InitechAuto do you know where i can have some more information like how to remove Blend doors and actuators before i tackle this myself any links will be great - and if i decide to take it to a garage should take it to a AC specialist or a local garage or MB specialist-

[@InitechAuto]

@@anthonysilva8220 Your best bet is probably the Mercedes-Benz specialist. This is something that if you’re not familiar with I would not attempt to do.

[@remyakrishnan7746]

Dear nic, mine is a 2005 model 211 e class kompressor. Today we had an issue with ac, we found the black couplar which u mentioned in the video to be broken. The connecting ends are now loosend. Now what to do. Pls help dear.... any suggestions woupd be extremely appreciated. Thanks in advance. Does this happen due to thermal expansion valve ? Compressor fan not working ? Last week they filled 450 gms of coolant. What could have caused wrong.... here mechanics are cheaters...they would loog money....pls help🙏🙏🙏

[@InitechAuto]

If the coupler is broken you have to replace the hose that is part of it. Then you have to vacuum and refill the a/c system. The thermal expansion has nothing to do with it.

[@remyakrishnan7746]

@@InitechAuto actually only the couplar is broken...are u saying its alone not available. Have to change the full pipe? And one more doubt...what reason could have caused it...due to high pressure of gas ? Any idea dear?

[@InitechAuto]

@@remyakrishnan7746 Yes the whole hose has to be replaced. The coupler is part of the hose. As to why it failed I have no idea. But I can tell you that it was not the freon pressure. The hose is made to withstand the pressures.

[@remyakrishnan7746]

@@InitechAuto thanks dear, i got it replaced. And one more doubt pls... Few weeks back there was sqeueky noise from suspension. And they made me change arms. Ball joints etc etc... And after few days again that noises are coming. What could be the issue? Any guess.... Ur time is appreciated... Thanks in advance

[@InitechAuto]

@@remyakrishnan7746 Check your struts.

[@mikeysmith6525]

Hi mate. Do you think could be same issue in my w207 2009 e350 3.0diesel ?

[@InitechAuto]

What are your manifold gauge readings?

[@mikeysmith6525]

@@InitechAuto I will check today. Only I know diagnostic data pressure reading is 8,2 bar and don't change much when ac is on or off

[@tonydiesel3444]

06 do this?

[@mateooksywie5405]

Witam.mam w211 2007r .Czy jest jakaś akcja serwisowa ? Mam z tym jechać do mercedesa ?

[@InitechAuto]

Jeśli masz problemy z klimatyzacją, zleć to sprawdzenie dealerowi.

[@KiluminatiLiving]

Where did you buy the replacement hose?

[@InitechAuto]

www.autohausaz.com/ Any auto parts store that sells Mercedes parts will do. The new hoses will be of the updated design.

[@joynoor4028]

Hi what is the parts I need please I have a Mercedes e class w212

[@InitechAuto]

Check with your parts store and check and see what part goes to your vehicle specifically. I do not have the part number for the one that I used in this video.

[@cameronevans8188]

Where can I find that hose?

[@InitechAuto]

Look on the Internet. Or most part stores that carry that hose. All new hoses are of the updated design now.

[@debbiefarrugia9472]

Mine e class

[@mercedez179]

My ac is automatically turning off Mercedes s 550 08

[@InitechAuto]

Ok, thats not really telling much. Does it shut off right away or does it work awhile and then stop? Did you check for a full charge of freon? Is the compressor running?

[@mercedez179]

@@InitechAuto it turns off a few seconds after turning it on, one of the hoses is really old , could this cause the system to do this?

[@InitechAuto]

@@mercedez179 Sounds like its low on charge. Take to a A/C specialist and have them look at it.

[@mercedez179]

Thank you

[@714ATK]

Nicoya - Nicaragua?

[@InitechAuto]

Pinolero!

[@714ATK]

Igual! I just subscribed. This is very informative my brother. My AC is not working. My car is blowing but hot air. I’m going to try this if not it’s probably going to be the compressor.

[@InitechAuto]

@@714ATK Check your A/C pressures. It will help you to diagnose the problem.

[@donnfl]

ANY IDEA WHAT BULLITIEN THIS IS. ##

[@InitechAuto]

Don't remember.