I have a 1988 190E.
I just had my battery charged and tested OK by Advance Auto parts. They said its probably the alternater. They sell one for $250 new, includes $50 core charge.
Question is this part OK, or should I go to my MB shop and get a genuine Bosch alternater?


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ROX

Only about 1 out of 5 alternators fail & need replaced. The real problem is the voltage regulator. It bolts onto the back of the Alt. & is simple to replace. Either way stay w/O.E. Bosch parts.

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MERCEDES BENZ MASTER GUILD TECHNICIAN
ASE MASTER TECHNICIAN
27 YEARS M.B. TECH

Thanks, for your quick reply.
I have a catalog from IMPCO that has exploded drawings. I don't see the Voltage Regulater. How much is it? How "simple" is it to install?

Thanks.

Usually about 100. or so US dollars. And it is about a hour or two if you haven't done the repair before and you have to take the little cover off of the rear of the alt.

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Benzmac:
ASE CERTIFIED MASTER AUTO TECHNICIAN
LEAD TECHNICIAN FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM

On my 83 SD's alternator there is a rectangular black plastic box attached to the back of it. About an inch long or so. Is this the voltage regulator or do i need to remove half the alternator housing?

Thanks,

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Robert W. Roe
1983 300SD 264K mi

Thanks, all. A followup: The Voltage Regulator was bad. My MB mechanic replaced it. Part was $29, labor $48.


Thanks,

Robert, yes the volt reg. is the little black box on the rear of the alt. Two screws & its off.