<FONT size=2>I have an '89 420SEL. Was running ok, until i tried to use it to jump another vehicle that was having serious electrical / battery problems. Now I'm losing juice from the batter when the vehicle sits. </FONT></P>


<FONT size=2>It will charge, and the alternator is putting out plenty of juice, and the car runs fine, but again...if it sits for a couple of days after being fully charged, it's dead. </FONT></P>


<FONT size=2>I'm wondering if the Voltage Regulator is fried open....has anyone had the same problems?</FONT></P>

 

Just my thoughts, I am not a mechanic.</P>


I was told not to jump off other vehicles with my MB mainly because of the cost to repair the electrical system should something short out (mainly the computer $6,000 for my S600 and $4,200 for my C36). Since it still runs it sounds likeit's not the computer. You may want to have the battery load tested to see if you burnt a cell out. If it's not your battery I would take it to your mechanic and let them check the voltage regulator for you. </P>


John</P>