Hello good folks,

I have lived with this for sometime despite occasional efforts to locate the source of drain.

Typically using a multi-meter between one of the battery terminals it records high then slowly drops off as it should, problem is it doesn't always drop down but unaware unless testing.

Today however something changed, normally I can open the drivers door and lower the window, open sun roof without inserting keys (it only works with door open).

My first thought was flat battery but engaging glow plugs proved to not be the case, sunroof and window also opened no probs but needed key, so question what controls this circuit?

The large clunky relay (located behind fuse box) has already been apart and tested.

Thanks,

__________________
David


1996 Mercedes S124 E300TD - 129k - rolling restoration project -

1998 Mercedes W210 300TD - 118k (assimilated into above vehicle)

Which car?

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

Its the S124 300 TD, replaced door jam switches a while back or cleaned those that were okay.

Pretty sure this is the circuit or at least part of it, opened the rear nr side door yesterday which I don't normally do with seats folded down.

__________________
David


1996 Mercedes S124 E300TD - 129k - rolling restoration project -

1998 Mercedes W210 300TD - 118k (assimilated into above vehicle)