Alternator Problems - Page 2 - Mercedes-Benz Forum

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post #11 of 25 (permalink) Old 07-11-2016, 03:11 AM
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Mine arced out on itself during some particularly sloppy and wet winter weather.
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post #12 of 25 (permalink) Old 07-11-2016, 01:48 PM
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Hi from Mtl., hey Road_Ghost, just came from under the wife's car. Looks like a bear to get that out. Any tips before I dig in?
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post #13 of 25 (permalink) Old 07-11-2016, 03:27 PM
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Originally Posted by Play Time View Post
Hi from Mtl., hey Road_Ghost, just came from under the wife's car. Looks like a bear to get that out. Any tips before I dig in?
My indie did the replacement (thanks to the extended warranty). Something towards the back has to come out before the alternator does. I would suggest a hoist too.
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post #14 of 25 (permalink) Old 07-13-2016, 05:21 AM
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Ok thanks for the response Road_Ghost, anyone else tackle this one?
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post #15 of 25 (permalink) Old 09-23-2016, 03:11 AM
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Hi. The ¨clutch pulley¨ is basically a one way clutch system (OAP - Overrunning Alternator Pulley) which allows the generator to gently coast to 0 Rpm naturally and not making a sudden stop when the engine is shut off (alternator is the heaviest mass on the accessory drive, so a sudden stop can put a lot of stress on V-Belt and tensioner). It also absorbs vibrations from the running engine since the RPM is not constant and reduce stress on the tensioner rail.

The pulley itself is a part which can be replaced on its own P/N A6401500960. Its not a cheap part, probably better to replace the whole alternator assembly if you get a good deal on it. I have never replaced the pulley myself on the B-Class, but youre gonna need some special tools if you want to do this yourself. WIS states that Hazet 2592 is necessary to release the pulley from axle. If you want to replace the alternator, youre gonna have to remove the (optional) AC compressor aswell, inorder to be able to take out alternator

My alternator pulley was replaced at the same time when a merc-dealer was changing broken water pump. Since the engine is already lowered, its an easy task then. But after a couple of days driving, loud ticking noise came from the engine bay. I called the shop and they towed it back. Few days later they called and said that alternator pulley got loose and damaged the belt and the generator, and that they replaced all of this.
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post #16 of 25 (permalink) Old 06-19-2017, 10:46 AM
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Need doc about changing alternator on B200

I would like to try to change the alternator myself. It is 327$ Cad + Tax on eBay.
I did not find any video on youtube or any writing about out to DIY. When I go under the car it seems to be quite simple. So before I buy an alternator I would have like to find some documentation.
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post #17 of 25 (permalink) Old 06-20-2017, 06:37 AM
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Ok changing the alternator on a B-Class is a DIY job. I have done it and here are my notes:
https://fr.scribd.com/document/35179...denser-B-Class
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post #18 of 25 (permalink) Old 06-20-2017, 06:48 AM
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Ok I just realized that I could upload here the steps to change an alternator on a B-Class.

In case you can not get the document on my last link, here is another solution:
http://docdro.id/kao21qQ
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File Type: pdf Alternateur-Serpentine-AC Condenser B-Class.pdf (1.84 MB, 7 views)
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post #19 of 25 (permalink) Old 06-20-2017, 07:15 AM
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Thanks cbilodeau..Great work and diagrams..!!!..and great attachments for all of us here.

I still have my OE alternator and all is fine,..but now I have some great options thanks to you..

Greatly appreciate this fine work by you..
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post #20 of 25 (permalink) Old 06-20-2017, 07:21 AM
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Thanks Devours. Please do the same if you change something on your B-class B200. It seems very difficult to find any documentation so everybody must do a small piece. I have 5 kids, the oldest is 17. If I can fix the B200 myself, I will buy probably another or two.
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