HOW TO DIAGNOSE MERCEDES A B CLASS STARTER FAULT

[@saifcathum3423]

One of the most useful videos I have seen. Let this be an example to others. Thank you.

[@TenCentsMusik]

I appreciate you a lot sir because you just saved me a lot of unnecessary labour and money. I found that the purple wire was loose and so the car wasnt starting. But after doing the test on this video, it started because I used a multimeter to push it in and walla, the starter worked.

[@isaacmambo1663]

This is awesome I have been having similar problem on my A170 CDI. You have really saved the world from heavy spendings to our local Garages many times they do solve problem other way round and you get home with same problems.

[@miwka40]

Man you are a genius! I just pull that 3 wire connector and then mercedes b200 started. Thanks a lot!

[@jelenajelena2209]

I have w169 and this video solved my problem! He had same issues, starts when is cold, but not when he's been warmed up. And yes, it was starter. YOU ARE GREAT

[@richardrooney9098]

What model do you have and how hard/expensive was it to replace starter?

[@jelenajelena2209]

@@richardrooney9098 w169, a180, 2004. he said he just did repairing, so it was 100$, but it is much cheaper in most of the places, becouse they usualy just change removable parts so it can be from 30$ to 100$

[@johangustavsen6962]

I will add one comment prior to swapping the starter. A click sound may also be poor battery voltage. I had the exact sound as here and power in the purple wire, but only 10,5v in the battery. Swapped the battery and no more start issues. My petrol 150 had an original 75ah battery, while most online suggest a lower capacity 62-64ah that might give a too low starting power.

[@kailash7761]

Hi, Excellent video, I have a problem where my car won't crank and also won't start. The last time it started it made a sound for 5 seconds cranking .... I'm not sure what I should look for? Starter relay or starter motor? All the lights and headlight starts without any issue

[@howtoscientifically7355]

You are a gold mine, my dear sir!

[@garyosgood9276]

I love your videos, your so there and no bulls hit. Great job 👍

[@astrologystars7390]

Do you have a video showing how to change a fuel pump relay on a mercedes A class 150 year 2005 .. which i believe is on passenger side so how does one get access to it.

[@michaelsteyn5325]

Thanks for this video. Do you have a video showing access to or replacing the starter motor?

[@Leon_Brown]

To reach the starter you must lower the subframe. To lower the subframe you must undo the steering, when you undo the steering you must be very careful because inside the steering rack there is the torque sensor which damages very easily en will cause intermittent power steering failure. Also intermittent starting failure is often caused by a bad +15 Relay which is the grey one in the relay holder behind the glovebox. You can temporaly power the +15 section by powering one of the green 30A fuses in the fusebox next to the battery. There you go and now i wil hope to get extra karma points :)

[@forrera168]

@@Leon_Brown yes, extra karma points for you

[@matthiasendler7268]

Your video is pure gold! Thankfully the starter is working, so I don't have to change it. It's an ECU problem, that when the engine is "hot" there is no voltage when turning the key to start between the purple wire and the minus of the battery. So my solution is a bit hacky but it works... having a push button connecting the purple cable with plus of the battery :)

[@thaborivele7712]

How do you connect the purple cable to the battery

[@matthiasendler7268]

There's a plug connector in the battery compartment with a blue, brown and purple white cable. You cut the puple white cable on the female connector side and then solder a new cable to it on the side of the female connector. Make sure you use heat shrink tubing to isolate the soldered connection and also put some heat shrink tubing on the now open end of the cable which is coming from a relais. If you don't do that, you run the risk of a short and then there's NO fuse and that could end pretty badly!!! Then I connect the newly soldered cable (make sure the cable is a 2.5 mm² cable) to the battery plus using a push button and a second cable. This is very hacky, as it would be better to also have a fuse and a protective diode in order to cancel possible sparking in the push button and also protect against a possible short. It would be even better to use a relais... but I had none at hand and my solution works for me... Do this at your own risk!!! As you need to be sure, that you do it correctly. Also do the testing first, as this solution only helps if there's no signal comming from the ECU when turning the ignition, otherwise your starter isn't working correctly. Make sure you consult the electronic schematics of your particular model and understand exactly what you do before doing anything... blindly following my instruction could worsen your problem!!! So again: DO THIS AT YOUR OWN RISK AND DON'T FOLLOW MY INSTRUCTION BLINDLY!

[@matthiasendler7268]

@@thaborivele7712 Afterwards when you start. You need to turn your ignition key and the press the button in order to start...

[@gilberthapavakwi427]

77b

[@Pisarz_Milosci]

Thank Matthias. I'm use your live hack 😂. I'm returning home from another city 😂

[@georgesikharulidze7819]

Thanks for your job. I'm already desperate to find a solution

[@fredericperimon5529]

Hello Sir, and thank you for sharing so generously your expertise. On my W414 Vaneo 1.9 (like A190), symptoms are slightly differents : I have no click when trying to start, more like a buzz coming from the air box. I did your two tests, the bulb lights on, and it doesn't crank when bridged to +. But i have no click, just a buzz. Does this change the diagnostic of a faulty starter ? Thank you again, your video puts an end to very incomfortable weeks of searches.

[@forrera168]

As long as you have a good battery then the starter is faulty

[@fredericperimon5529]

@@forrera168 Thank you for your prompt response. And yes, I have a good battery, new and bigger than the original one (75Ah). Some of the pros who have looked into my problem are talking about a bad ground connection, which looks like a low battery... do you think this can be true?

[@wouterdevilliers3756]

Can you show us how to replace the starter on the W169 by lowering the rear of the engine please? Petrol engines.

[@royalmech4061]

thank you brother ..very very helpful video❤😊😊😊

[@mohdanuarismail4348]

Hi sir, i have w245. I bridged the purple cable to positive and d car would start (ignition on). However, when i turned d ignition key without bridging , there is no power at d purple cable. I also notice that the ac blower doesnt work. What would be the problem?

[@TotNuAlaDin300]

Thanks a lot man. You save me...you my Hero 💪🏽💪🏽💪🏽

[@mycomment6699]

Dear Sir, thank you for your tutorial, I have a mercedes w168 190 benzin, 2000 model, when ever i start it in the morning, it crancks first time, then dies immediatly, the second time, it works, i have always to crank it twice, once its warm, there is no problem at all, can you help.me diagnose, fuel filter is new, oil filter, oil, throttle body and MAF cleaned thoroughly, air filter, never left it to reach quarter tank, always full, fuel pump relay is new, fuses are ok, no codes on obd 2, battery is three years old, but charging system is ok 14,2 V, didnt play with electrics, new tps on pedal, besides, spark plugs are uni electrode sparks, bought on car part no. less than 15000km on them, Am going crazy to guess why i have to crank twice every morning, summer and winter????? I really appreciate the help. Another thing, the fuel guage started couple of months ago not showing the full tank, even that i fill it up untill pump automatically stops, it shows up to three quarters full only, can you guide for this please. Many thanks to you, already a new subscriber to your beautiful channel

[@nselimbatha]

Hi sir, I have a Mercedes B200 turbo 2008 model. The car wouldn't unlock with the remote so I had to open it manually. Nothing is lighting up in the car even when I try to start it. Could the problem be the battery or should I have the starter checked as well?

[@forrera168]

Check the battery first

[@nselimbatha]

@Sevan Motors FORRERA I'm trying to jumpstart the car using a 619 battery. The lights inside are on, and it buzzes when I turn the start key but doesn't start. Should I keep it connected to the 619 battery longer then try to start again? Or should I start looking for other possible problems?

[@nselimbatha]

@Sevan Motors FORRERA You were right, it was the battery. I used a bigger battery to jumpstart and it worked. Thank you so much💗💗

[@worldofartposters405]

Hi. My father has an A170 - always cranks okay but most times takes 5 to 10 attempts to actually get the engine going. Often worse in cold weather. No-one around here can help. Does anyone has any ideas? (Great video by the way, thank you!)

[@forrera168]

There's a number of reasons why the engine is difficult to start. Coolant temperature sensor might be faulty, timing chain stretched, fuel pump relay on the way, dirty throttle body etc.

[@worldofartposters405]

@@forrera168 Thank you very much for your reply. It is very appreciated. On a right hand drive A170 is the fuse relay under the dash on the passenger side?

[@khaledelbassyouni9503]

Thank you for your information, I had A200 model 2005, changed the starter, the battery and checked the key in several garage but unfortunately I never find a solution to this problem. Still, it start only when she wants ..

[@rbrood267]

Hi. Did you found the solution. Same here with a a200

[@drew42drew42huthut]

@@rbrood267 Did you try to change the starter relay?

[@serdartekin4560]

Thank you for the video. It was really helpful to find out the problem for my W169 A150 petrol manuel 2006. In fact, I tried to connect the purple cable to the battery and it starts well (it was not starting with the ignition at that time). Therefore, it seems that the problem is not the starter. I also tested the battery with a multimeter and it shows between 12.36V and 12.62V (after turning on the headlight for two minutes), falling around 10.90V during igniting, and around 14V during running the car, which means the battery is fine, I think. If the problem is not the starter, what do you think the problem is? Any suggestion is welcome. Thanks

[@thaborivele7712]

I have the same problem, how did you connect the purple wire to the battery?

[@suffyxx8662]

What was the culprit for u Serdar? I have same issue

[@serdartekin4560]

It was the starter motor, unfortunately. No problem after replacement.

[@MP-mu1kw]

I have an identical starting problem on my B200. The starter will not crank the engine is hot say if I drive it for 30 mins and park up and switch off the engine and try restarting it simply does the same things as what you show in your video. I have to leave the engine to cool down before it will start again. When starting from Cold it starts first try. Do you think it is the starter or could it be something else? The starting battery voltage is 12.4v and when running it is 14.4 - 14.6v.

[@forrera168]

Do the purple wire test to confirm if it's the starter or not first, as in the video.

[@MP-mu1kw]

@@forrera168 I did the bulb test on the purple wire with the engine hot and it lighted up just like you showed in your video. This means 12v is going to starter. Does this also mean the relays for starting which i think there are 3 of them also good and dont need checking??

[@forrera168]

@@MP-mu1kw yes, that means the starter is faulty, relays ok

[@MP-mu1kw]

@@forrera168 Thanks for confirming. I'm in Canada and will try and look for any Indy. Curious to know if you ever figured out whether it is the cheap solenoid that becomes faulty due to overheating or could it be the actual starter motor packs up?

[@drew42drew42huthut]

@@MP-mu1kw Did you figure it out?

[@blazbohinc4964]

Mine is one the way out. Usually I can get it to crank after I rock the car a bit to change the position of starter crankshaft.. if has some spots where it won't turn. It's getting replaced very soon

[@55golly55bolly]

Hello have a question my car does not start merzedes benz w 168 I bridged the purple cable like in the video and touched the battery directly. And after I put the key in it starts up. But what's the problem now ???? The starter or the releys ???

[@forrera168]

If it starts every time when you bridge it then check your ignition switch.

[@55golly55bolly]

@@forrera168 thanks for the video my friend . I found the problem I use a digital multimeter and check the releys and nr 8 is starter reley and I change it number 8 with green 30 reley and my car start ✌️ thank you for the video you the best 🙏

[@kailash7761]

@@55golly55bolly can you please send location of this starter relay in the car? Thanks

[@khandurrani4069]

Sir i have a class 56 reg diesel. 1: The interior lights are not working. Don't know which fuse to check. 2: Eps light is on. 3: Message on board that running on flat tyre. But tyres good n not flat or less pressure in it. Help please.

[@forrera168]

Traction control and tyre pressure are linked. One of the sensors is not functioning properly, wheel speed sensor, brake light switch or steering angle sensor. A diagnostic scanner will tell you which sensor is faulty.

[@julesofsouthafrica9994]

Thankyou. Where is the video for the resistor pack for the aircon switch. I have a 2003 A160 W168

[@forrera168]

W168 is blower resistance is identical, it's also fitted in the same location, just pull the carpet to gain access.

[@forrera168]

same as this kzbin.info/www/bejne/r4u8YX-trNesiKcsi=DuPTirFQqY5SelAz

[@suffyxx8662]

I have all 3 wires in this connector are earthed. Where do the wires from this connector go to

[@nasiryousafzai4197]

As per your instructions i already buy the starter but unfortunately it is very difficult to change so can you show me the easy way to change the starter ? Or if you already made the video on it so please send me a link of this video 🙏. Thanks a lot and i will appreciate that.

[@forrera168]

Sorry, there is no easy way. It is straight forward though. Remove exhaust middle clip, inner splash guards and earth wire, then support the back of the engine and remove rear engine mounts and lower the engine to gain access to the starter motor. Good luck.

[@MarinaMatic]

@@forrera168 So lowering the engine is the only way?

[@drew42drew42huthut]

@@MarinaMatic no, there is another way

[@NicholasRiviera-Dr]

@@MarinaMaticI replaced our starter by going down through the top

[@kostassiaperdas8188]

very nice video that will save us from many outings. but if it is not the starter then what else could it be that the purple cable has no power ??

[@forrera168]

You can do this simple test without a scanner or visiting a garage, but if you have no power in the purple wire then you'll need a scanner. Having said that it's less common and I suggest checking the fuse box for water damage.

[@kassalablueberry9035]

You are awesome.

[@jasonrogers1960]

​@@forrera168 Can you please help me??? My car ( same model as the video) has had trouble starting lately, almost as though the starter is tight or bound. It sounds like a flat battery at first, a slow woop woop and then it will turn normally. Sometimes it will not turn over at all but make a very loud grinding sound but you can tell it's not turning the motor. It might do this 2 or 3 times and then start normally. Well today it won't start at all and just gives a slow woop woop like a flat battery even with a brand new battery installed and another car connected with their engine running

[@matt2010918]

I have the same problem but my car won’t start in cold winter. Have anyone got the same issue?

[@Crouks89]

Very helpful and informative thank you

[@mohamedmusrati3321]

I have the same problem that I explained in the video. What do I do to make the engine spin? Please help me

[@forrera168]

Try tapping the starter gently with a long bar behind the inlet manifold while trying to start, or hold the key in start position for up to 20 seconds.

[@MarinaMatic]

@@forrera168 Hi. I have Aclass 160 and i replaced started brand new original 6 months ago. Once again it doesn't work in the morning, same as in video. Once I push the car and get it running it runs normally all day, but after the night won't respond at all. The guy is asking 600$ to lower the engine and I do not have that kind of money. is there a video showing how to replace started without removing the engine? Thank you!

[@forrera168]

@@MarinaMatic what year is your A160, petrol or diesel?

[@delcloymichel6888]

super merci beaucoup.

[@FosterLogisticsBusiness]

What is the cost of Starter for Mercedes A170 CDI?

[@forrera168]

£600 all in

[@FosterLogisticsBusiness]

@@forrera168 Thank you for your informative resources. I have really learned a lot. I will keep on to contact you sir.

[@Grinnser]

What a wonderful clean Car ;)

[@forrera168]

Customer car, no comment

[@ivormachin530]

hi i have a starting problem if try to start with key it will not start but if i put a live wire from battery to the purple wire it will start but not without it what is it please

[@forrera168]

Check the starter relay behind glove box

[@drew42drew42huthut]

The problem could be the solenoid?

[@petemoss8625]

my A Class clicks when I turn key, but wont start? any ideas.

[@forrera168]

Check the battery first, then carry out starter check like the video

[@Witchhazel86]

@Sevan Motors FORRERA Hi, Hope so much fir your help - can a bad starter also screw up the generator? Needed to push the car before getting it to start, and all of a sudden the battery lamp turned red during driving. So it won't charge. Changed the battery a few month's ago. 2002 petrol. Appreciate your thoughts 🙏 ⚘️

[@Witchhazel86]

It's also worsening during cold weather (live in Sweden) 🥶

[@forrera168]

@@Witchhazel86 I very much doubt it. Faulty starter or battery won't damage the alternator

[@MarinaArtDesign]

I changed the starter brand new and still get same error. What else can I do?

[@forrera168]

Did you do the check, like the video?

[@TheFreesabin]

you just got a new subscriber ;) 10x

[@wabinator69]

I have a similar thing on a w169 a200, click sound and all but it only happens when starting the engine when it’s warm. Starts like a dream in the morning or when it’s sat for an hour, but stop the car when it’s hot and wait a few minutes and it won’t start until it cools down again! Would this be heat soak in the starter or corrosion in the lines? How could I test this? Cheers (Germany)

[@forrera168]

Just do this simple test in the video when ho/not starting to confirm if the problem is the starter.

[@wabinator69]

Right ok I shall try tomorrow, what about corrosion in the starter supply wires? This would be a simple visual inspection?

[@forrera168]

this model does not suffer from starter wire corrosion

[@wabinator69]

You are a legend! May I ask you to have a look and listen to this video? It’s short and you can see my starter problem. kzbin.info/www/bejne/o3jYonSPmdNna9U

[@drew42drew42huthut]

What was the issue?

[@stefanciprian752]

i have the same problem on mercedes a140 from 2003 but mine don t hear the click anymore. please help! thank you sir!

[@forrera168]

Just carry out the same test, check for power in purple wire when key turned to start position.

[@stefanciprian752]

@@forrera168 I think is the starter. But now I can t find a mechanic to change it because they all saying that is too difficult. I don't know what to do...

[@forrera168]

Are you in the UK?

[@ElectricEssenceLtd]

@@forrera168 HI Sevan, I got the same problem and one mechanic said its Fuel Pump fault

[@forrera168]

@@ElectricEssenceLtd Well, if the fuel pump is faulty the starter would still turn over.

[@ekmrv]

How about the starter relay?

[@forrera168]

The replay is in between the starter and the ignition. If you have live at the starter that means the relay is ok. Just like the video.

[@ekmrv]

Thanks. I have an intermittent issue, and the starter was only replaced 4 months ago. Hence I am turning my attention to the Relay. However on the relay board there is no relay in position M, where MB advise it should be. There is a green relay on a separate connector (white rather than on the black rectangular board). Any idea if it was moved to another position on the W169 2012 A160? Thanks. Also this is the same A160 you repaired the VVT gearbox on in 2020. Still running. 😊

[@NicholasRiviera-Dr]

@1:27 😂