How to Replace the Serpentine Belt and Tensioner - Mercedes C240 C320 E320 CLK320 ML320 V6

[@ZeeshanMuhammadX]

Thank you for making this video! My father has a very old 1994 Mercedes E220 for which the serpentine belt recently came off and immobilising the vehicle -- the belt pulley (which attaches to the belt tensioner) was damaged and came off during him driving the car, resulting in the serpentine belt being damaged (and the belt pulley being lost). We understood the general gist of the issue, but we lacked awareness of the part terms, the labour involved to fix the issue and the cost of the replacement parts. This obviously isn't a very good situation to be in as a consumer, and we were afraid of our ignorance being exploited by garage/mechanic staff (through inflated billing). Your awesome video helped us confirm the issue as well as educating us on the correct terminology to use with garage staff. After learning the correct terminology for the parts, we were able to successfully query for the cost of the replacement parts via Google and our findings matched the costs given to us by our preferred garage! Thank you for making this video and educating the general public! We appreciate your efforts! :)

[@reomethach]

I came here to learn your method that was quite helpful; I must say... I never changed one is why I'm here. I would just like to add to your video that if one uses an allen key, one should remove the hidden bolt completely and then release the tension to remove key. Rational: you can retrieve the key back and ready to reuse. removing the pulley with the key still propped inside is a tougher job to remove key. Thank you again for your help!

[@dan2528]

ONLY video I could find that showed it clearly... so simple, yet unless you 'see' it, all the descriptions in the world can still have you muddling around. Thanks !

[@diyautorepairvideos110]

Dan Heffley Np, glad you found it useful. Cheers

[@Talex-vu4iu]

An actual video that was helpful. Thank you.

[@blakepiercy1528]

Just a quick thanks. I just replaced the tensioner on my 02 ML320. Your video was great,. it was short, to the point and relayed exactly the information I needed without a lot of BS. Excellent job!

[@FrettieFingers]

Saved my butt! The tensioner I have is like this one, and I almost made the mistake of following the Pelican instruction, which would have removed my tensioner instead of releasing it.

[@luisbares5101]

wow, thanks,I have a 2005 CLK 320 and I spend 10 minutes change the belt, thank you for this class, very good.

[@amandab6910]

this video is very knowledgeable. I own a 2000 ML320 and I'm a woman. I love DIY projects but not really when it comes to my truck. I get scared and always have my guy friend to who I'm really close to refer me to his mechanic. since I see how easy it is maybe me and him and possibly do it together. (: thank you very much.

[@diyautorepairvideos110]

+Amanda Beard Nice, hope you can get it fixed. GL and thanks for your comment.

[@Cipote68]

I am giving your video 2 thumbs and 2 toes up man. Thank you for sharing the knowledge. Thanks to your detailed instructions it took me less than 20 mins to replace the broken tensioner in my daughter's 2001 C240. Bought the serpentine belt kit online ($119.00 + $10.00 2 day shipment) so, thanks to your video I spent $129.00 parts and "labor" + the $4 beer I had while doing the job. You ROCK bud.

[@Lumenizer]

Thanks for your video. I know that serpentine belt replacement is a really easy fix, but I wanted to make sure that I wouldn't miss something, the car being German, and all. ;) The angles weren't great, but the lighting and instruction was! The "trick" with the Allen key was exactly what I was needing to know. Job well done, Sir! :)

[@edwardwhiteside8658]

It works, it worked, it will work. Just get those 17mm and E-17 and maybe a friend with some extra time for the belt. Will work perfectly. CLK 320 is back on the road 👌

[@johnwet5798]

Your vdo is very clear and straight forward, unlike others. I can see only their hand !

[@dogsbyfire]

Clear, thorough instructions which are easy to understand. Thank you!

[@thomas_saved_by_yeshua]

Video... just what I needed to see to change my tensioners ml320

[@MrDeleoco]

Using your video to DIY MINE...ML320 This information is a great SERVICE

[@svorracs]

Thank you so much for showing us how to replace belt tensioner pulley ,you did very good job

[@zerozeroisland]

Thanks so much! I followed your instructions for my '05 C240 4Matic, and i was able to change the tensioner and belt in under 20 minutes. The only hard part was locating a place that sold E Torx sockets! Luckily, Home Depot of all places stocks them. :)

[@Nyck461]

Great video. It is a relatively easy job

[@Laca521]

Nagyon jó ötlet, szépen látni a videón. Hasznos volt , köszönöm neked DIY Auto Repair Videos.

[@DrewAMG]

thanks for the video I'll be attempting this on my ml320 tomorrow

[@springwoodcottage4248]

Was struggling with Merc 220cdi (w202) 2000 model diesel, different engine to Haynes manual, but tensioner exactly as you showed: From frustration to success thanks to your video. Thank you!

[@k.o.t.f.467]

Thanks for the video, tensioner just seized and the belt snapped on my daughter's S430.

[@DPZ420]

I have that exact same car and my belt tensioner just went. Thanks for this video.

[@agumm8912]

Very well done. Crystal clear instructions. Thank you Sir.

[@gucktaree8239]

Thinking of buying one that belt came off! GREAT VIDEO thanks very much I subscribed!

[@josephfortunato1829]

Thank you very easy and informative

[@natedogg265]

It was even easier than it looks. I just took pics of the loops. I referenced it once.

[@supersonicsoda3]

Thanks for the tutorial. I noticed my tensioner moving more than it used to the last time I looked at it. Does that mean I definitely need to replace it or is there some way to align or tighten it so it isn't wobbly?

[@OttoMelher]

Great video mate, short, to the point, very helpful. Thumbs up!

[@momoo5843]

Excellent video! I subscirbed to your channel! Youre videos are very professional and offer an easy to follow tutorial for cheaper repairs! Thank You Very Much! One question: when do you think it is time to replace the belt or the tensioner? are there any symptoms or signals to look for? Thank you!

[@rolandoras6050]

Amazing video!!! Helped me very well. Just one question. Any idea how i get my used allen key back?

[@vdub4utube]

What all these videos leave out is all the work needed to even get to the belt. Once you demolish half of the engine changing the belt is child's play.

[@supersonicsoda3]

What model of car are you talking about?

[@thedigitalundergroundhouse3043]

I love it! Thank you so much!

[@gnarlytek1331]

Explain so well

[@Bonbonbon739]

So yeah I’ve been watching all these KZbin videos and reading for 2 days now. I don’t have a 17 mm bolt I finally was able to take a picture with my phone of the bolt that is under there, and it’s a 10 mm tork one. So for two days I have been trying to use a 17 mm socket on a 10 mm Torq. I don’t know if it’s because I have a really weird year I have a 2000 Mercedes E320 4Matic wagon. I cannot get this new belt on! And I already spent like $60 in tools

[@timothybruneau4173]

Ouch. I feel your pain buddy, but the 10mm Torx are the mounting bolts, the 17mm socket is simply what they put to flex the tensioner for removing/installing the serpentine belt. I'm about to tackle the same task on my 2000 CLK430, and yep it's hard to see under there. Hopefully you got yours done by now.

[@zu1502]

More Mercedes videos !

[@nowthatsfunny1]

Thanks for sharing. I have to do this to my car. I was dreading having to do this but you make it look simple. Now my question is...what's the best manufacturer of the belt tensioner? Dayco or Lintens?

[@krishchin9758]

Looks easy ...my serpitine tension broke damaging the radiator hose. I replaced the hose and on closer examination I discovered the tensioner is damaged.i will take the vehicle to Mercedes to repair...

[@youandiryan]

Thank you good sir. I have done everything correctly however I am having a b**** of a time getting the belt on. Even with the tensioner pushed to its full position I cannot for the life of me get the belt over it

[@colinaglae2605]

Nice informative video.

[@zazoo6909]

So my belt tore Now do I need to adjust something before putting it on or it’s okay to put in?

[@gucktaree8239]

Question: If belt just came off can you think hig persentage tensioner is the problem. How to test tensiioner?

[@mousaabdulateef9205]

عمل واضح وجميل

[@yuzer340]

thank you very much !

[@Motorsportsgeek]

damn i did it on mine but without that Allen key ... 2 wrenches, it wasnt fun.

[@timothybruneau4173]

A Phillips screwdriver will work, or even a very large nail.

[@musicforce7736]

What’s the torque for the 2 bolts ?

[@chuckslk2670]

Did you remove the fan assembly prior to starting this process and how much easier does that make this process?

[@kenechukwuodumodu7449]

Must you replace the tensioner anytime you replace the belt?

[@DmitriHolod]

Thanks!

[@darianluna3151]

Perfect info!! Easy!!

[@vusalhasanov5908]

Thank you

[@jeancinquambre6897]

great video ,clear and easy to understand the different steps performed ,I wish you had a video ,showing us how to replace a water pump on a 1994 w140 mercedes benz s500 ...if you know where i can find such a video ,it would be awsome ....thanks again ....

[@hiroyukininomiya8591]

When it cames to mount again, does it need any kind of sync? any pulley has marks what have to be observed and aligned? thanks

[@cease19811]

Could it be possible not to Change the tensioner pulley just the belt alone? Thanks

[@Talex-vu4iu]

Could you do a video on a topside oil change?

[@vanderneut]

Cool! Very clear video. You make it look easy :-)

[@ahmedhasan291]

thanks

[@bryonholman5893]

i feel like i missed something ?????? did you which engines or something?

[@lionheart6294]

How do you diagnose a bad belt tensioner because something is causing my alternator to stop working,My alternator is new as well as the battery I just replaced the idler puller and it caused my alternator to stop working so I took alternator to get tested and it was bad so I put a new alternator in and a few days later it wasnt charging battery so I removed belt and played with pulleys put belt back on and all of a sudden alternator is working again so that is why I am asking you for advice on diagnosing a bad tensioner,thanks and great video by the way!

[@Cyberdemon1985]

If the tensioner is bad, you will have slippage. You will be hearing screeching noises coming from the belt and or watching a wobbling tensioner pulley. Most likely, you had a DOA Alternator. Alternators I would buy OEM. Anything else, go with an aftermarket.

[@dan1027]

Hey mate I have a 2004 MB140 diesel that I'm struggling to get rid of belt slipping. Are you familiar with them?

[@9682joe]

Hello, thanks for vid. My belt in my c240 is squeaking loudly, can I just replace the belt or do you suggest replacing tensioner as well? The belt seems pretty tight as is without doing anything so far.

[@JannineHadid]

I haven't got the $$ for the tensioner rn and I think it's fine, but I know my belt is in rough shape so imma change just that and I'll let you know how it goes!

[@rjuarez4913]

Clear except the size of Allen key. I believe it’s 4 or 5mm

[@ronhill8533]

I NEED TO KNOW THE NAME OF EVERY TOOL HE USED!! PlEASE

[@jordan59961]

Is this the same belt layout as the C55 AMG?

[@newtonraymond77]

Great video description, why do you always look so curious? I guess that's your normal face 😉😜😜😜😜😉 LoL

[@zzzysr]

On mine the tensioner jerks back and forth while the car is in idle. Would that be the housing spring or the pulley??

[@Cyberdemon1985]

The tensioner.

[@Dmitrii_B]

Is it necessary to change the tensioner together with the belt?

[@DeliriumXM]

No not unless yours is messed up

[@MauriceCovingtonvideographer]

Is it necessary to remove the tensioner in all instances or can the belt simply be replaced?

[@Cyberdemon1985]

If you have time, replace the tensioner too. Only $35 item. The new belt itself will outlive the tensioner.

[@DeliriumXM]

cm your lucky lmao the tensioner cost us 200$

[@dogwalkingphilosopher1103]

what is that very topmost pulley? near as I can tell It's a water pump. I ask because that wheel is gone on mine as of yesterday

[@Cyberdemon1985]

To the left is a water pump. That is what goes first as it did on my 2005 c240. See video link below which depicts the bad water pump... kzbin.info/www/bejne/b53ZeqGBadSJj80

[@cexyalmostevil]

What do you do if the loosener bolt get rounded off?

[@Cyberdemon1985]

Just use a big plumber's wrench on the whole tensioner to remove the right bolt, or put the allen wrench, as in the video to hold the tensioner in place, and unscrew the two bolts. You may need a friend to help you hold down that plumber's wrench. Again the tensioner is only $35 after market.

[@berowawa3907]

I have ML320 when I try to put the belt back it doesn't lose enough what should I do?

[@Cyberdemon1985]

Give it some more elbow grease, or call a friend to help you. Use a pipe on your wrench for more leverage (Archimedes 500 BC)

[@atos.nympha3451]

any reasons why u should change tensioner?

[@EXOVCDS]

+Ato Nympha It has a bearing that is non-serviceable (has a limited amount of grease inside of it). They will get noisy with age... and can seize-up & take out the belt. When replacing a belt, it is a good idea to change the tensioner, as it might not last the lifetime of the new belt.

[@atos.nympha3451]

+Thomas EXOVCDS good to know .thankx very much

[@EXOVCDS]

+Ato Nympha Forgot to mention that the same holds true for any of the other "idler" roller bearings / pulleys.

[@kchilz32]

Thomas EXOVCDS couldn't you just change the pulley instead of the whole unit?

[@Cyberdemon1985]

I saw some prices. That tensioner damn thing is a $35 item. Forget the pulley... go for the whole tensioner. The new tensioner will last another 100K miles. Anything with bearings and the car is 100K miles, just replace it. Also, my c240 water pump that has bearings went bad at 68K miles. The new water pump part set me back $19.99 from ebay (this is no typo). This is because my car was sitting in some old man's guarage for years. A big no no since bearings needs to work and be lubricated. A sitting low millage car is worse than a highway miles car.

[@EoeSantinny]

half video. how about putting on new tensioner?

[@sfisoeugene1090]

hi guys I'm owning a Mercedes C280 W202 6 selender V6 "98 model I have a problem of a light on the dash when I drive more then a 100 km it come as a warning light of oil it says "oil high" I had changed oil sensor.and oil as well but the problem persist please anyone can help me reply cheers guys.

[@cu2tonite]

+Sfiso Eugene I had this issue happen when I got my oil change in my 01 c240 (203) and to resolve it, I had to get some oil taken out. The car had to too much oil in it. Not sure if there is something else causing your issue, but that was mine.

[@kchilz32]

Couldn't I just swap the pulley instead of the whole unit?

[@Cyberdemon1985]

I saw some prices. That tensioner damn thing is a $35 item. Forget the pulley... go for the whole tensioner. The new tensioner will last another 100K miles. Anything with bearings and the car is 100K miles, just replace it. Also, my c240 water pump that has bearings went bad at 68K miles. The new water pump part set me back $19.99 from ebay (this is no typo). This is because my car was sitting in some old man's guarage for years. A big no no since bearings needs to work and be lubricated. A sitting low millage car is worse than a highway miles car.Read more Show less

[@jamesbailey7404]

.not. bad.

[@DrewAMG]

man those tires are bald

[@christophercolumbus8944]

you didn't replace sh you just removed it

[@sslim29205]

Thanks !