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#2
12-02-2006, 05:41 AM
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It could be a problem with the ignition switch, or an internal short of the alternator.
__________________
-diesel is not just a fuel, its a way of life-  '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) 
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#3
12-02-2006, 11:21 AM
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90% of the time its a short internal to the alternator. This is the only time my 300 has left me "stranded", except I was easily able to drive it home, I just didn't drive it for 2 days while I installed the alt. Problem solved for me.
__________________
Adam Lumsden (83) 300D Vice-President of the MBCA International Stars Section
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#4
12-02-2006, 11:31 AM
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Might also try replacing the voltage regulator. It's cheaper than a new alternator.
__________________
Andrew '04 Jetta TDI Wagon  '82 300TD ~ Winnie ~ Sold '77 300D ~ Sold
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#6
12-02-2006, 12:01 PM
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Your problem is caused, as others have said, by a short circuit in the alternator or the regulator. The regulator should be part of the alternator; it bolts in at the back (2 screws) and can be removed with the alternator still in the car. Use the search function for "regulator" and you should bring up lots of threads and photos. It's easy to R&R.
If the regulator checks out OK (test by replacing with a known good one) then the problem is a shorted diode in the alternator itself, requiring replacement of the whole alternator -- no separate diode board, unfortunately, as in BMW motorcycles.
__________________
 "Buster" in the '95 Our all-Diesel family 1996 E300D (W210) . .338,000 miles Wife's car 2005 E320 CDI . . 113,000 miles My car Santa Rosa population 176,762 (2022) Total. . . . . . . . . . . . 627,762 "Oh lord won't you buy me a Mercedes Benz." -- Janis Joplin, October 1, 1970
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Linear Mode
