Discussion Starter · #1 ·
My 1991 300E 4matic died while driving. Battery dead. I jumped it the next day and was able to drive a short distance to a service station. They charged the battery. Checked out the battery and alternator,and diodes all OK. Drove home 5 miles. Next morning checked the battery 12.4 volts with engine off. 14+ volts with idle speed. Drove about 25 miles and it all happened again. The terminals are cleaned. Charging battery now and hope to get the car home today. Any thoughts or experience out there? What about the OVP relay? Checked the 10 amp fuses and are OK. Anything else to check before I give up and go to the dreaded dealer.