dead alternator.....agghhh
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Member
Joined: Jun 2015
Posts: 155
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c63 AMG
dead alternator.....agghhh
I took my car for a fast long tough drive. After about an hour the red battery light came on and the radio turned off. I kept driving and when I arrived home I checked the charge which was 11.3 volts (too low.) My question is which part of the alternator is not working properly? Is it the voltage regulator, the alternator itself or perhaps the pulley bearings? Is there any way to diagnose this? Can the pulley go bad and be replaced without taking apart the alternator?
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Joined: Aug 2011
Posts: 5,351
Likes: 1,677
From: Kitchener, ON
2010 C63 AMG
Did any of these threads help?
https://mbworld.org/forums/c63-amg-w...ase-chime.html
https://mbworld.org/forums/c63-amg-w...lternator.html
https://mbworld.org/forums/c63-amg-w...behaviour.html
https://mbworld.org/forums/c63-amg-w...r-battery.html
This one is my favourite
https://mbworld.org/forums/c63-amg-w...-question.html
https://mbworld.org/forums/c63-amg-w...lp-please.html
https://mbworld.org/forums/c63-amg-w...or-output.html
https://mbworld.org/forums/c63-amg-w...ase-chime.html
https://mbworld.org/forums/c63-amg-w...lternator.html
https://mbworld.org/forums/c63-amg-w...behaviour.html
https://mbworld.org/forums/c63-amg-w...r-battery.html
This one is my favourite
https://mbworld.org/forums/c63-amg-w...-question.html
https://mbworld.org/forums/c63-amg-w...lp-please.html
https://mbworld.org/forums/c63-amg-w...or-output.html
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From: Houston - Clear Lake
C63 coupe, Z3M Roadster garage queen
^ A really good example of how powerful the search function is here. Jasonoff works it like a ninja.
Newbies - take note and learn from the master!
Newbies - take note and learn from the master!
Thread Starter
Member
Joined: Jun 2015
Posts: 155
Likes: 2
c63 AMG
Nope. Didn't really help but thanks. My main question is and remains "is there a way to tell if the pulley bearings are ok." We have a very complicated energy management system on our cars and with complicated you need excellent diagnostics as opposed to "oh change the battery."
Super Member
Joined: Aug 2011
Posts: 688
Likes: 14
2013 C63 Coupe
Well, if you're already come to the conclusion that something is wrong with the alternator, there could be several things that I could think of: brushes, VR, rotor bearings.
First, how many miles does the car have? Assuming this is the original alternator on a high mileage car, brushes are probably worn. I've changed brushes on another car I had with 183,000 miles, it had similar symptoms as you described.
First, how many miles does the car have? Assuming this is the original alternator on a high mileage car, brushes are probably worn. I've changed brushes on another car I had with 183,000 miles, it had similar symptoms as you described.
Thread Starter
Member
Joined: Jun 2015
Posts: 155
Likes: 2
c63 AMG
Well, if you're already come to the conclusion that something is wrong with the alternator, there could be several things that I could think of: brushes, VR, rotor bearings.
First, how many miles does the car have? Assuming this is the original alternator on a high mileage car, brushes are probably worn. I've changed brushes on another car I had with 183,000 miles, it had similar symptoms as you described.
First, how many miles does the car have? Assuming this is the original alternator on a high mileage car, brushes are probably worn. I've changed brushes on another car I had with 183,000 miles, it had similar symptoms as you described.
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MBWorld Fanatic!
Joined: Aug 2011
Posts: 5,351
Likes: 1,677
From: Kitchener, ON
2010 C63 AMG
First thread I shared, 2nd post explains how.
https://mbworld.org/forums/c63-amg-w...ml#post6426914
4th thread I shared, 6th posts links to a pic of the alternator location.
https://mbworld.org/forums/c63-amg-w...ml#post6080725
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From: Alabama
09 Carrera S, , 03 F250 CC FX4
I took my car for a fast long tough drive. After about an hour the red battery light came on and the radio turned off. I kept driving and when I arrived home I checked the charge which was 11.3 volts (too low.) My question is which part of the alternator is not working properly? Is it the voltage regulator, the alternator itself or perhaps the pulley bearings? Is there any way to diagnose this? Can the pulley go bad and be replaced without taking apart the alternator?
