W124 no power after charging battery

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Dickie14

New Member
Joined
Apr 6, 2014
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19
Car
W124 E220 Coupe
Hi guys

Left my E220 coupe with the interior light on and drained the battery... So I removed it, charged it, put it back in and went to start the car. There was a pop like a fuse blowing and then nothing - completely dead. There's 13.2V at the battery, double checked I hadn't got the polarity wrong and none of the fuses in the fuse box are blown. What have I done? Is there some master fuse somewhere that I've somehow popped?

Cheers,
Dickie
 
There's an Overvoltage Protection relay that is notorious for giving this problem.

Unfortunately, I can't remember where it is..

I good Google should narrow it down...
 
On the 124 the OVP Relay is situated behind the battery. There is a floppy plastic pull out cover that, when pulled out gives you access. The OVP has two blade fuses.

Your battery voltage does sound to be too high at 13.9? It may just pop your fuses again.


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