Notices
W211 AMG Discuss the W211 AMG's such as the E55 and the E63
Sponsored by:
Sponsored by:

Bad Alternator or Voltage Regulator?

 
Old 09-02-2015, 12:42 PM
  #1  
Super Member
Thread Starter
 
MTV10's Avatar
 
Join Date: Aug 2014
Location: Montreal, QC
Posts: 970
Liked 53 Times in 44 Posts
E55 AMG & C63 AMG
Bad Alternator or Voltage Regulator?

Went out for some runs with a few buddies the other night.
Nice casual Monday night....

Ran my friend's FBO E60 M5. He just recently installed his headers.
Car has amazing top end. I need a pulley upgrade to have a chance.

Then I ran a 2012 C63 P31 with 2nd cat delete... walked all over him. Good 3 cars I'd pull everytime.

Then out of nowhere I get these warning lights on the dash.....








Nursed the car to my friend's house that was close by. Parked it overnight. Next day went to the shop and borrowed a booster pack to be able to drive it over. Back to my buddy's house to get her going....



I was a little nervous about the brakes giving up on me... being electric and all. As I made the turn to the street where the shop is located, lost power steering and all brake feel.... used the E-brake to be able to turn into the garage.... man was I lucky.... timing is everything.

And here she sits.....





Been doing a bit of reading... and some say voltage regulator solves their issue. I noticed a plastic burning smell though... so I'm thinking my alternator is just shot. Any insight?

Thanks guys.
MTV10 is offline  
Old 09-02-2015, 02:24 PM
  #2  
Junior Member
 
atxE55K's Avatar
 
Join Date: Jun 2014
Location: Austin, TX
Posts: 22
Likes: 0
Liked 0 Times in 0 Posts
2005 E55, 2008 Toyota Tacoma, 1995 Porsche 993 C2, 1997 Porsche 993 Turbo


This happened to me about a year ago. I pulled the alternator and took it to a repair shop. They reported that the internals were good, but the rectifier had shorted out. This is what caused the burning smell. They suggested replacing the bearings as long as the alternator was out of the car. Total cost for rectifier and bearings (part and labor) was $130.

Last edited by atxE55K; 09-02-2015 at 02:29 PM.
atxE55K is offline  
Old 09-02-2015, 03:44 PM
  #3  
MBWorld Fanatic!
 
jmb614's Avatar
 
Join Date: Jan 2011
Location: West
Posts: 1,229
Liked 14 Times in 14 Posts
E55 AMG
"Brake Malfunction"
"Stop Vehicle"

That's quite a conundrum...
jmb614 is offline  
The following users liked this post: jmb614
SBundlez (Yesterday)
Old 09-02-2015, 03:45 PM
  #4  
Senior Member
 
Join Date: Apr 2015
Posts: 352
Liked 29 Times in 20 Posts
04 E55 AMG
Plastic burning smell is the alternator. was such a pain to replace. Take the fan shroud out and disconnect all the radiator lines on the front passenger side.
gjunon is offline  
Old 09-02-2015, 04:56 PM
  #5  
MBWorld Fanatic!
 
2000UZJ's Avatar
 
Join Date: Jul 2014
Location: Earth, USA, Atlanta, GA
Posts: 1,302
Liked 21 Times in 20 Posts
458 Speciale, 911 Turbo, Q5 TDI, E55
Originally Posted by jmb614 View Post
"Brake Malfunction"
"Stop Vehicle"

That's quite a conundrum...
lol...
2000UZJ is offline  
Old 09-02-2015, 05:13 PM
  #6  
Super Member
Thread Starter
 
MTV10's Avatar
 
Join Date: Aug 2014
Location: Montreal, QC
Posts: 970
Liked 53 Times in 44 Posts
E55 AMG & C63 AMG
Originally Posted by jmb614 View Post
"Brake Malfunction"
"Stop Vehicle"

That's quite a conundrum...
Exactly what I said when that warning came up lol
MTV10 is offline  
Old 09-03-2015, 01:53 AM
  #7  
Super Member
 
6speeddave's Avatar
 
Join Date: Apr 2015
Location: FL
Posts: 576
Liked 33 Times in 27 Posts
2012 CLS63 PP
I have a new OEM Bosch voltage regulator I can sell you that I bought as a back up a few months ago. Let me know if you want it.
6speeddave is offline  
Old 11-01-2015, 01:33 AM
  #8  
MBWorld Fanatic!
 
Max.H's Avatar
 
Join Date: Nov 2007
Location: San Diego
Posts: 3,681
Liked 29 Times in 28 Posts
E55
Originally Posted by gjunon View Post
Plastic burning smell is the alternator. was such a pain to replace. Take the fan shroud out and disconnect all the radiator lines on the front passenger side.
I can see the 2 smaller intercooler lines that are in the way. Can you clarify if you mean actual radiator hoses or the smaller coolant hoses that go in and out of the intercooler on that same side. Thanks
Max.H is offline  
Old 11-01-2015, 04:06 AM
  #9  
Senior Member
 
Join Date: Apr 2015
Posts: 352
Liked 29 Times in 20 Posts
04 E55 AMG
I took out the radiator lines (the big hoses). Also the double pulley came out. Made it much easier to get the alternator out without puncturing a radiator line. I heard you could squeeze it through the lines but I wasn't able to do so.
gjunon is offline  
Old 03-02-2016, 08:32 AM
  #10  
Junior Member
 
Join Date: Jun 2015
Location: Dubai
Posts: 21
Likes: 0
Liked 0 Times in 0 Posts
CLS55 and CL63
here is my situation with the voltage in the car

its a 2006 cls 55 amg


at idle does not charge, shows battery voltage
when i rev it up around 1500, voltage goes up to 14, 14.1 volts

while driving tends to stay around 14v, but as soon as rpms drop, seems to stop charging

any ideas?
sszgo is offline  
Old 03-02-2016, 09:03 AM
  #11  
MBWorld Fanatic!
 
Join Date: Jan 2009
Location: Northern VA
Posts: 3,157
Likes: 0
Liked 8 Times in 7 Posts
W211
has your alternator been replaced or is it the original?
front battery and rear battery original or been replaced?
If all 3 above have been replaced, then would look into battery relay thats under the windshield or the battery control module in the trunk, black box by the bumper
novae500 is offline  
Old 03-02-2016, 09:32 AM
  #12  
Junior Member
 
Join Date: Jun 2015
Location: Dubai
Posts: 21
Likes: 0
Liked 0 Times in 0 Posts
CLS55 and CL63
i am not sure but not changed for atleast 2 years for how long i have this car

batteries both show good voltage 12.5 volts when car is off and hold the charge for days

BCM in trunk should be working fine, i tested battery with negative terminal and it shows same voltage when tested against car chassis as negative (thus it should skip the BCM i guess), tested while car is running ofcourse

i can test the battery relay, any photo or info how to get to it? and how to test it
sszgo is offline  
Old 03-02-2016, 09:35 AM
  #13  
Junior Member
 
Join Date: Jun 2015
Location: Dubai
Posts: 21
Likes: 0
Liked 0 Times in 0 Posts
CLS55 and CL63


is this it? how do i test if this works or not ?
sszgo is offline  
Old 03-02-2016, 12:00 PM
  #14  
MBWorld Fanatic!
 
Join Date: Jan 2009
Location: Northern VA
Posts: 3,157
Likes: 0
Liked 8 Times in 7 Posts
W211
thats it under the passenger side windshield.
novae500 is offline  
Old 03-02-2016, 01:05 PM
  #15  
Super Member
 
AMG__POWER's Avatar
 
Join Date: Apr 2015
Location: SoCal
Posts: 606
Liked 16 Times in 15 Posts
1998 c230, 2016 e350, 2006 E55, 2016 BMW I3, 2005 e55, 1998 e320 wagon, 2005 clk320
Originally Posted by MTV10 View Post
Went out for some runs with a few buddies the other night.
Nice casual Monday night....

Ran my friend's FBO E60 M5. He just recently installed his headers.
Car has amazing top end. I need a pulley upgrade to have a chance.

Then I ran a 2012 C63 P31 with 2nd cat delete... walked all over him. Good 3 cars I'd pull everytime.

Then out of nowhere I get these warning lights on the dash.....








Nursed the car to my friend's house that was close by. Parked it overnight. Next day went to the shop and borrowed a booster pack to be able to drive it over. Back to my buddy's house to get her going....



I was a little nervous about the brakes giving up on me... being electric and all. As I made the turn to the street where the shop is located, lost power steering and all brake feel.... used the E-brake to be able to turn into the garage.... man was I lucky.... timing is everything.

And here she sits.....





Been doing a bit of reading... and some say voltage regulator solves their issue. I noticed a plastic burning smell though... so I'm thinking my alternator is just shot. Any insight?

Thanks guys.
I was recently in the same situation then I replaced the voltage regulator, the battery and after all this I found it was the alternator so just go for the alternator
AMG__POWER is offline  
Old 03-02-2016, 01:12 PM
  #16  
Junior Member
 
Join Date: Jun 2015
Location: Dubai
Posts: 21
Likes: 0
Liked 0 Times in 0 Posts
CLS55 and CL63
Originally Posted by AMG__POWER View Post
I was recently in the same situation then I replaced the voltage regulator, the battery and after all this I found it was the alternator so just go for the alternator
Why not just buy whole new car while at it
sszgo is offline  
Old 03-02-2016, 01:18 PM
  #17  
Super Member
 
AMG__POWER's Avatar
 
Join Date: Apr 2015
Location: SoCal
Posts: 606
Liked 16 Times in 15 Posts
1998 c230, 2016 e350, 2006 E55, 2016 BMW I3, 2005 e55, 1998 e320 wagon, 2005 clk320
Originally Posted by sszgo View Post
Why not just buy whole new car while at it
Good point next time alrernator needs changing I'll buy a new whip lol
AMG__POWER is offline  
Old 03-04-2016, 02:43 AM
  #18  
Member
 
Jelanib's Avatar
 
Join Date: Nov 2015
Posts: 109
Liked 7 Times in 7 Posts
2004 E55 AMG
Since the light came on while you were driving, it's likely the alternator. Change the VR first, you can get to it underneath the car. You just need to remove the plastic and there are like 6 screws/nuts that hold it on. The parts only like $50-60 so it's worth a shot before taking out the alt.
Jelanib is offline  
Old 03-04-2016, 07:25 AM
  #19  
MBWorld Fanatic!
 
Join Date: Jan 2009
Location: Northern VA
Posts: 3,157
Likes: 0
Liked 8 Times in 7 Posts
W211
try replacing voltage regulator. If it doesnt work then the alternator for sure.
novae500 is offline  
Old 03-05-2016, 01:10 PM
  #20  
MBWorld Fanatic!
 
dyno's Avatar
 
Join Date: Apr 2007
Location: Italy
Posts: 1,154
Liked 0 Times in 0 Posts
cls 55 or FIAT Coupe T20v-6speed
Originally Posted by sszgo View Post


is this it? how do i test if this works or not ?


you DON'T need to test that relays if your main battery is good.
the K57 relais kicks in only in that case (besides for charging the Aux battery).

both bolts (#2 in the pic) are Positive, and you have a lot of chances to make a short . so, just stay away from it. Warned .
dyno is offline  
Old 03-07-2016, 03:12 PM
  #21  
Senior Member
 
fila0220's Avatar
 
Join Date: Nov 2009
Location: Queens NY/ Ft Lauderdale FL
Posts: 397
Liked 6 Times in 6 Posts
W211 E63
i had a similar warning light, ended up being an alternator.

https://mbworld.org/forums/w211-amg/...ml#post6502327

best of luck
fila0220 is offline  
Old 11-02-2017, 12:42 PM
  #22  
Newbie
 
Join Date: Nov 2017
Posts: 1
Likes: 0
Liked 0 Times in 0 Posts
all model
Originally Posted by AMG__POWER View Post
I was recently in the same situation then I replaced the voltage regulator, the battery and after all this I found it was the alternator so just go for the alternator
I dnt think it's your alternator or battery giving you the problems...it might be your cranksharft pulley is slipping...( in begining stage) pls inspect the crank pulley..
Wanb Rzzuan is offline  
Old 11-10-2017, 10:33 PM
  #23  
Junior Member
 
Join Date: Jun 2017
Location: Lo$ Angele$
Posts: 28
Liked 1 Time in 1 Post
2005 Mercedes Benz E 55 AMG
Originally Posted by MTV10 View Post
Went out for some runs with a few buddies the other night.
Nice casual Monday night....

Ran my friend's FBO E60 M5. He just recently installed his headers.
Car has amazing top end. I need a pulley upgrade to have a chance.

Then I ran a 2012 C63 P31 with 2nd cat delete... walked all over him. Good 3 cars I'd pull everytime.

Then out of nowhere I get these warning lights on the dash.....








Nursed the car to my friend's house that was close by. Parked it overnight. Next day went to the shop and borrowed a booster pack to be able to drive it over. Back to my buddy's house to get her going....



I was a little nervous about the brakes giving up on me... being electric and all. As I made the turn to the street where the shop is located, lost power steering and all brake feel.... used the E-brake to be able to turn into the garage.... man was I lucky.... timing is everything.

And here she sits.....





Been doing a bit of reading... and some say voltage regulator solves their issue. I noticed a plastic burning smell though... so I'm thinking my alternator is just shot. Any insight?

Thanks guys.
My guess would be the voltage regulator or the serpentine belt...both would give you that red battery warning...i had both happen to me also 😕
MR E55 AMG is offline  
Old 04-07-2018, 06:59 PM
  #24  
Newbie
 
Join Date: Oct 2004
Posts: 4
Likes: 0
Liked 0 Times in 0 Posts
p

I want to thank TalonP for post # 76, excellent descriptions and pictures.

My car: Mercedes 2013 E350

After going through steps described by TalonP on post #76, my steering wheel column still would NOT move up or down. I gave up and put everthing back together, resigned of spending $1500 to $1800 at the dealership.

However, I keep on searching for other posts and there was one where they talking about door being open vs closed ignition being on vs off. To satisfy my curiosity, I went back to my car, sat on driver seat, closed the door, removed the on/off button of the ignition so I could turn ignition switch with the key, turned ignition one step before engine would start, push lever down while hitting steering wheel on top, followed by pushing lever up while hitting steering wheel at the bottom towards the ceiling, and then ... the column started to move!

It now moves up and down. However, since I do not know why it stop working, other than something got stuck somewhere, and I do not want to pay the dealership $1500 to $1800 to fix it; I positioned the steering wheel the way I like it, and then I disabled the "Easy on/off" feature so the steering wheel will not move up/down in/out when I get in or out of the car.

TalonP - Thank you so much for your pictures and detailed description.

Cheers,

Flying C
flying c is offline  
Old 03-01-2019, 07:44 AM
  #25  
Member
 
Join Date: Feb 2017
Posts: 88
Likes: 0
Liked 1 Time in 1 Post
CLS55AMG
Basically in a nutshell, if you are seeking just best bang for the buck in a serious upgrade without a lot of hassles then you could use just these front S55 calipers along with an R500 13.8" front rotor and it will bolt on fine and need nothing custom and nothing else. you may need a 5mm washer at the caliper mounts but I don't remember for sure and will check to confirm this. that is really all you'd need to do to upgradeHello turbocad, I just wanted to confirm as I have an early 06 R500 with the solid rotors on rear and 13" front brake rotors and stopping acts like front drum brakes! I am very interested in going with S55 from calipers and 13.8" rotors on the front of these will bolt on with a 5mm washer at the caliper mounts. Thank you for all the R&D you have done with these R class brakes! I do only have 17" R350 wheels on my R500 at the moment (bought the car like that) so will S55 calipers clear the 17" wheels?
CDC55AMG is offline  

Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:

Quick Reply: Bad Alternator or Voltage Regulator?


Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: