Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

LinkBack Thread Tools Display Modes
Old 08-31-2007, 11:03 PM
zaq121's Avatar
Registered User
Join Date: Aug 2007
Location: Toronto, Ontario
Posts: 7
1977 Mercedes 240d Battery Problem


I am new to the mercedes diesel cars although I have owned many other mercedes cars in the past. The problem I'm having with my car is the battery light started coming on when driving. The next day the car wouldn't start but I could jump start it. I tested the battery and charged it and the car worked fine for a few days. I noticed that the turn signals would would blink slow and then the car died again. I am thinking this is an alternator problem but I want to get a few opinions before I buy a new alternator. Thanks for the help.

Reply With Quote
Old 08-31-2007, 11:55 PM
300SDog's Avatar
gimme a low-tech 240D
Join Date: Jan 2003
Location: central ky
Posts: 3,602
Jumpstart the car again and get freebie battery test at wally's world, this will tell you status of alternator output too. Then pull the regulator (2 phillips screws on alternator back) and inspect the teeth for excessive wear. Often $20 reg needs replacement instead of $150 alt. And if you decide on new battery too then grab the largest battery on the shelf, diesels require helluva lot more juice to kick over than gasoline benz you're used to.
Reply With Quote
Old 09-01-2007, 12:36 PM
zaq121's Avatar
Registered User
Join Date: Aug 2007
Location: Toronto, Ontario
Posts: 7
Thanks for the advice. I took my car to an auto parts store and they tested the alternator. He said the alternator output is low. I mentioned to him about the regulator which he agreed could cause my problem. I bought one and put it on. I charged the battery up and the light still comes on. I'm going to take it back there and have them check it again to see if it got any better. If the alternator is bad then what do you recommend to do? (new after market or rebuild). Thanks.
Reply With Quote
Old 09-01-2007, 08:20 PM
Registered User
Join Date: Apr 2003
Location: Phoenix Arizona. Ex Durban R.S.A.
Posts: 3,321
Be sure to check the wiring that goes to the alternator as well. I had lot's of trouble with my 240D's alternator. I changed the regulator which help for a while but then found that the wires going to the alternator were frayed so badly that some of them were not even making contact. In the end though I also had to replace the alternator.

- Peter.
81 240D stick. 316000 miles at purchase. 340000 now
2000 GMC Sonoma
2002 Kia Rio. Worst crap on four wheels
1981 240D 4spd stick. 389000 miles. Deceased Jan 08
1984 123 200
1979 116 280S
1972 Cadillac Sedan DeVille
1971 108 280S
Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 07:05 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page