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z281974 · 08-14-2010, 03:17 PM

Its the Alternator - low battery voltage. Same symptoms happened to me last week on my 01S, with a bad alternator voltage regulator. Battery voltage went down to 10.6v. I had a similar experience with my '86 Mercedes, with the ABS light on, but not the battery light. Bosch apparently still can't get the battery light to be more sensitive to low voltage than the ABS / PSM lights. Check the battery voltage before driving again - it should be in the 12.2 - 12.8 volt range when not running.

08-14-2010, 03:17 PM	#5
z281974 Registered User Join Date: Mar 2005 Location: new york Posts: 17	Alternator Its the Alternator - low battery voltage. Same symptoms happened to me last week on my 01S, with a bad alternator voltage regulator. Battery voltage went down to 10.6v. I had a similar experience with my '86 Mercedes, with the ABS light on, but not the battery light. Bosch apparently still can't get the battery light to be more sensitive to low voltage than the ABS / PSM lights. Check the battery voltage before driving again - it should be in the 12.2 - 12.8 volt range when not running.