W124 no power after charging battery

Dickie14

New Member
Joined
Apr 6, 2014
Messages
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
 

kid-jensen

MB Enthusiast
Joined
Dec 16, 2002
Messages
1,224
Location
Epsom Downs
Car
ML 320 W164
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...
 

brucemillar

MB Enthusiast
Joined
Nov 18, 2010
Messages
8,659
Location
Next Door to Alice - 25 'kin years now
Car
C55 AMG Wagon - W124 300te 4matic Wagon - BMW 4.8is X5 E53 - SWB Pajero 3.5 V6 24v
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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