E500 Battery Drain

REACHROMANO

MEMBER
2003 MERCEDES BENZ E500
V8
AUTOMATIC
70,000 MILES

My 2003 E500 has a battery drain which I believe is 2.5 volts. Any ideas as to what the cause of the drain might be and how to detect what the cause is?

Thursday, February 17th, 2011 AT 9:35 AM

1 Reply

MHPAUTOS

MECHANIC
31,937 POSTS

Place an amp meter between battery Pos and the battery cable, with doors closed and key out read the amps, if above say 1.5 (this will allow for clock, stereo and any ECU memory) start pulling fuses one at a time to isolate the draw, start here. Mark (mhpautos)