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Member Poll
How many miles on your W124?

0mi - 50,000mi
0mi - 50,000mi
5% [88 Votes]

50,000mi - 100,000mi
50,000mi - 100,000mi
10% [184 Votes]

100,000mi - 150,000mi
100,000mi - 150,000mi
21% [387 Votes]

150,000mi - 200,000mi
150,000mi - 200,000mi
25% [453 Votes]

200,000mi - 250,000mi
200,000mi - 250,000mi
18% [337 Votes]

250,000mi - 300,000mi
250,000mi - 300,000mi
10% [184 Votes]

300,000mi - 350,000mi
300,000mi - 350,000mi
5% [86 Votes]

350,000mi +
350,000mi +
7% [120 Votes]

Votes: 1839
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Started: 03/14/2011

Polls Archive

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» W124-Zone.com » Technical Issues
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Realay A 0015427819 stays on with all doors locked.
Manjunath Janakiram
I have recently acquired a W124 E 250 D (Assembled in India in the year 1996) - the chassis number is 1241266C 280550, engine number being 60591120038858. Car has done 100560 Kilometers with a single user since then and runs fine, but the battery gets discharged flat in a matter of a few days. Incidentally the battery is a few months old only and is in fine health.

As a DIY enthusiast I checked out the current draw on the battery with all systems off and I discovered that relay A - Comfort Convenience- operating the electric windows was being energized as soon as the battery is connected. I understand that this should energize only if the drivers door is unlocked or the key is in Acc/run/start positions. I unplugged the relay to verify if it was the only load discharging the battery, but there appears to be a few milliamperes load which possibly could be the clock load. Any information contrary to my surmise is welcome.

Plugging the relay again I disconnected the connectors in the door lock and yet the relay was being energised. I wonder why the relay is staying on. Is there any diode anywhere in the door circuit which is giving a false signal that a door is unlocked ? I am at my wits end as there are different circuit diagrams for different models and the relay is shown only as a block diagram.

Apparently the previous owner had this problem and possibly attributed the cause to age of the car and disposed it, though this car has been serviced only at the Mercedes Benz authorized dealer all along its lifetime at a single dealer at Bangalore in India. I am now hesitant to ask the dealer for the solution.
Would any of the seasoned electrical wizards please help out this newbie P L E A S E ? Thanks in advance.
Edited by Manjunath Janakiram on 12-27-2012 12:48
 
hymunu
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