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  #1  
Old 04-04-2003, 06:44 PM
David C Klasse's Avatar
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Location: Mission Hills in the City of San Diego
Posts: 2,352
1995 C280 Electrical Problems

This is going to be a little lengthy... so here goes.

For the past few months, my mechanic has been telling me my battery is weak, but I had no symptoms, and a relatively new MB battery, so I brushed it off.
Starting 3 or 4 days ago, I would randomly notice my battery light (in the instrument cluster) was dimly lit... on and off... and as it got worse, the ABS light came on as well. Well finally last night, I was driving along, and noticed my headlights dimming.. then my radio turned off, then the power windows slowed, and the car died. If I waited about 5 min, it would barely restart, then shut off.
So I had MB RoadSide Assistance give me a new battery last night. Car has driven just fine since... however, the battery light is still dimly lit. My alternator is going south right?
Could this also be the reason my SRS code won't clear (dealer says it won't clear, so I need a new SRS module?).

I'm taking the car in Sun when I go out of town, so we'll see what happens... I just wanted a little heads up... I think alternator.

Thanks everyone!
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2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)
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  #2  
Old 04-04-2003, 11:02 PM
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Join Date: Dec 2001
Location: Southern California, U.S.A.
Posts: 8,508
It sounds like you have all the classic symptoms of a bad alternator.
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Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".
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  #3  
Old 04-04-2003, 11:34 PM
Ali Al-Chalabi's Avatar
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Join Date: Nov 2000
Location: Knoxville, TN
Posts: 1,837
Bad alternator most likely, measure the voltage in the system with the alternator running to see if it is running at battery voltage or the correct voltage.
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Ali Al-Chalabi

2001 CLK55
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record
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  #4  
Old 04-05-2003, 02:34 AM
David C Klasse's Avatar
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Join Date: Jan 2001
Location: Mission Hills in the City of San Diego
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Well, after about 24 hours, and 30 miles later... the battery died again. Battery light brightened, ABS light came on, lights dim, and car died. AAA charged up my battery real good, and then followed me home. I made it just fine. Yup, sounds like the alternator to me too.
I've got it hooked up to a wall charger, on SLOW charge all night to be sure I can get to work in the morning (530 AM!!).
I'm taking it in Sunday.

Thanks.

BTW, anyone know how much an alternator is for my car?
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2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)
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  #5  
Old 04-05-2003, 02:34 PM
Moderator
 
Join Date: Dec 2001
Location: Southern California, U.S.A.
Posts: 8,508
Here is a quote from Fast Lane:

F4000-51631 Alternator Bosch

List Price $291.00
Sale Price $185.91

Core charge $75.00
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Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".
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  #6  
Old 04-11-2003, 01:46 PM
JonathanEvans
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Posts: n/a
Changing Alternator

I'll walk you through the steps on how to change the alternator. It can be tricky especially when you have to loosen the belt. Drop me a line if you have any questions. I just replaced my alternator and all is well.
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  #7  
Old 04-11-2003, 06:31 PM
David C Klasse's Avatar
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Location: Mission Hills in the City of San Diego
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Well here's an update. I took my car to my mech... they couldn't find anything wrong with the car. THey said the alternator is doing it's job, but that the belt is not pulling the alternator properly. From eyesight, the belt is spinning everything just fine. My car is still not fixed. before the end of today, I"m taknig it to the Mercedes dealership and getting a RENTAL!

I'll keep you posted.
__________________
2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)
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  #8  
Old 04-11-2003, 11:54 PM
JonathanEvans
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Alternator

David,

I suspect that your alternator is going bad. If the pulley is not pulling I mean let's think about this logically. If the belt is tight and it's turning, then it should turn the alternator. If your battery is not charging then it's your alternator.

Before spending a bunch of money at a dealer I would buy a new alternator, install it then see for yourself. If, in fact, it's not the alternator return it.

Jonathan
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  #9  
Old 04-12-2003, 06:20 PM
JonathanEvans
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Hi,

I guess it all depends on where you buy the alternator.
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  #10  
Old 04-14-2003, 10:16 AM
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Join Date: Jan 2000
Location: Chesapeake, VA
Posts: 399
If the belt tensioner fails and the belt loosenes, the alternator might not spin at full speed. The belt tensioner is a rubber bushing that tensions the belt as the bushing is twisted by the adjustment screw.
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  #11  
Old 04-14-2003, 04:24 PM
David C Klasse's Avatar
CheFrac is Back!
 
Join Date: Jan 2001
Location: Mission Hills in the City of San Diego
Posts: 2,352
Some mechanic I have? Mercedes-Benz says the alternator is shot.... I just ordered a new one via PartsShop. Thanks for the Part # Paul. I'll have the new one put in, hopefully by me, tomorrow. I shoulda known it was just the alternator!

Anyways, I'll keep you posted.
Thanks for all the tips guys.
__________________
2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)
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  #12  
Old 04-14-2003, 04:30 PM
Registered User
 
Join Date: Oct 2002
Location: Colorado Springs
Posts: 481
are you sure it is the alternator not the brushes and the voltage regulator?
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Martin Ingram
Colorado Springs
2005 320 CDI
2006.5 VW Jetta TDI
1991 560SEL (179000 Sold)
1972 280SEL 4.5 ('The Lead Sled' 320000 miles when sold.)
1972 220D (225000 when sold)
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  #13  
Old 04-14-2003, 04:41 PM
David C Klasse's Avatar
CheFrac is Back!
 
Join Date: Jan 2001
Location: Mission Hills in the City of San Diego
Posts: 2,352
At this point? I sure hope not...............
__________________
2006 E350 w/ 155k miles (Daily Driver)

Previous:
1993 300E 3.2L Sedan w/ close to about 300k miles
2003 E500 Brilliant Silver (Had 217k miles when totalled!)
1989 300E with 289,000 miles (had for <1 yr while in HI)
03 CLK 500 cabrio (Mom's)
2006 C230k (Dad's)
1999 S420 (Mom's/Dad's)
2000 C230k Sport sedans
2001 CLK320 Cabrio (Mom's)
1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!)
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  #14  
Old 04-14-2003, 05:59 PM
sixto's Avatar
smoke gets in your eyes
 
Join Date: Jun 2000
Location: SF Bay Area
Posts: 19,759
Quote:
Originally posted by mhingram
are you sure it is the alternator not the brushes and the voltage regulator?
I second that. It's usually a good gamble to try an unreturnable $40 regulator before getting a new alternator (which comes with a new regulator).

David, I'm surprised you didn't pick this up in the archives. Classic worn regulator brushes symptoms.

Sixto
91 300SE
87 300SDL
83 300SD
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  #15  
Old 04-14-2003, 09:31 PM
JonathanEvans
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Posts: n/a
Reburbished Alternator

Hi guys,

I just replaced my alternator with a refurbished one from Partshop.com with Phil. I had to return the old one (core). The refurbished one is working great.

Jonathan
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