Question Details

Each time I park my Mercedes Benz w202 over night. What I  discovered next day was a flat battery the car would not start again.. I run scan on the said car no solution yet...

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Profile picture for user MercedesMedic

MercedesMedic  1 week 5 days ago

A scan is not going to show anything. What you have is a system not going to sleep and draining the battery. 

You need a multimeter that can measure current draw. Then pull one fuse at a time and check which system is drawing over 0.3A.

Start with the audio gateway. If not that check the rest of the circuits. 

 

Profile picture for user MBFanatic

MBFanatic  1 week 5 days ago

Check out this video on how to find a parasitic darw.