Any experiance of fault detailed below?

duncanb
0

Asked by Apr 19, 2013 at 10:47 AM about the 2005 Mercedes-Benz C-Class

Question type: Maintenance & Repair

The battery/Alternator warning light appears intermittantly despite the battery being new and a volt meter reding shows alterntor is charging.Model is c200 cdi

9 Answers

tenspeed
87,185

It could be the alternator is failing or there is a loose wire somewhere. Plug in a cigarette lighter voltage gauge to check it. -- http://www.ebay.com/itm/12V-24V-Digital-LED-Auto-Car-TRUCK- SYSTEM-Lighter-Voltmeter-Gauge-Voltage-Meter-/190819892334? pt=Motors_Car_Truck_Parts_Accessories&hash=item2c6dc07c6e&vx p=mtr

3 out of 3 people think this is helpful.

ground wire off the battery to the chassis has been comprimized through corrosion, take the black wire off polish it clean, need to pull 300 CCA's through there, also the connection to the motor block and chassis. Be sure they've got what's comin' to 'em~

2 out of 2 people think this is helpful.
John Sturman
2,055

the charging circut is controlled from the ecu on the merc as it shares the same principle as the chrysler ecus and the fault itself is where the chip for the circut is breaking down had one similar put a rectifyer circut in line and bypassed the ecu to charge the battery and pulled the bulb behind the dash

2 out of 2 people think this is helpful.
bobkat
7,805

Just got my 2007 MB out of the shop yesterday. Similar problem. It took several days of testing to find problem. All test of battery and alternator were good. The shop manager decided to let the car run in idle for well over an hour - then they discovered that the regulator started to steadily reduce its output to the point where it was no longer charging the battery. Replaced the regulator and now life is good.

4 out of 4 people think this is helpful.

a 2007 Still has a voltage regulator? thought they stopped using them altogether 'round 1980, what do I know? I know that you can get a one wire alternator with regulator built-in and throw the regulator that you've got into the bin, and don't worry the one-wire job has it down~ wondering now if there is a one-wire alternator replacement to fit your buggy?

bobkat
7,805

The repair ticket from MB says Voltage Regulator in Alternator. The part was $163.40 plus labor.

they should at least give you the old one if they're rookin' ya' like that~

bobkat, am giving this guru business up, I've got an oil painting career to spend time on...it's been nice offering my help to you, one last thing on the one-wire alternator, apparently MBZ has two wire jobs- http://www.benzworld.org/forums/unimog/1505478-one-wire-alternator- conversion.html so long bobkat.....always a fan!~

1 out of 1 people think this is helpful.
bobkat
7,805

Judge Roy - its always great to hear from you. Have a good day.

Your Answer

Add photo

Related Questions

C-Class

Looking for a Used C-Class in your area?

CarGurus has 29,435 nationwide C-Class listings starting at $1,495.

ZIP:

Search Mercedes-Benz C-Class Questions

Mercedes-Benz C-Class Experts

#1 Lorne Grandison
Lorne Grandison
Reputation 3,980
#2 PPC123
PPC123
Reputation 2,590
#3 zabi
zabi
Reputation 1,860
View All

Related Models For Sale

Used Mercedes-Benz E-Class"
647 Great Deals out of 22,519 listings starting at $1,600
Used BMW 3 Series"
1,391 Great Deals out of 38,634 listings starting at $1,000
Used Mercedes-Benz S-Class"
159 Great Deals out of 6,568 listings starting at $1,995
Used Mercedes-Benz CLS-Class"
91 Great Deals out of 2,593 listings starting at $7,786
Used BMW 5 Series"
677 Great Deals out of 18,714 listings starting at $1,500
Used Audi A4"
316 Great Deals out of 12,745 listings starting at $1,500
Used Mercedes-Benz CL-Class"
33 Great Deals out of 656 listings starting at $4,900
Used Mercedes-Benz M-Class"
317 Great Deals out of 6,171 listings starting at $1,999
Used BMW M3"
68 Great Deals out of 1,727 listings starting at $5,988
Used Mercedes-Benz CLK-Class"
79 Great Deals out of 1,495 listings starting at $2,400
Used Ford Mustang"
764 Great Deals out of 39,859 listings starting at $1,450
Used Honda Accord"
1,257 Great Deals out of 74,425 listings starting at $995

Used Cars For Sale

2017 Mercedes-Benz C-Class For Sale
4,142 listings starting at $39,977
2016 Mercedes-Benz C-Class For Sale
115 Great Deals out of 10,718 listings starting at $25,999
2015 Mercedes-Benz C-Class For Sale
33 Great Deals out of 1,155 listings starting at $22,455
2014 Mercedes-Benz C-Class For Sale
121 Great Deals out of 3,514 listings starting at $16,977
2013 Mercedes-Benz C-Class For Sale
115 Great Deals out of 2,430 listings starting at $14,000