1999 Mercedes Benz 220cdi 4 cyl Two Wheel Drive Manual 126000 miles
My C220 has been flattening batteries with (initially) no obvious reason. I've checked the car for amps drain whilst at rest and found it to be about 330ma which to me seems fine.
Recently I've caught the alarm going off during the night. I suspect that this intermittentally goes off and flattens the battery.
All the door switches seem to be working as does the interior movement sensors. I don't think the mercury switch is to blame as there is no disturbance.
Car usually gets left at about 7pm and the alarm goes off at 2.30am then again at 4.30am.
Problem is intermittent - it can go a week or so with no problems.
Is there any other way the alarm can be triggered, any other ideas?
Thursday, May 7th, 2009 AT 1:49 AM