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mybenz | mysatisfaction Forum Index
   W203 C Class
     Current leakage - Car cannot start
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Poster Thread
Posted on: 2009/1/12 18:49
Certified Benzitos
Joined: 2008/1/1
From: Gelugor,Penang / R.Panjang,Kelantan
Posts: 294
Benz Model: C200K W203
Current leakage - Car cannot start
Morning surprise by my wife calling car cannot start due to
battery weak.Rush to worksyop & found that current leak even the car not ON. Worksyop still checking the source of
current leak, may be due to auto-seat motor,etc.
These leakage only can detect if car not ON ~2 days (saturday & sunday my W203 park at home).

Dear bros, anyone experienced these situation before.
Hope can share the cause,c'measure & repair cost.

Tonight the car sleep at worksyop (KA Auto, Jelutong).

Yesterday is history,Today is reality & 2morrow is mistery!
Membership ID : 2538

Posted on: 2009/1/12 18:55
Joined: 2005/8/19
From: Shah Alam
Posts: 6450
Benz Model: 260E
Re: Current leakage - Car cannot start
sorry to hear about that bro. hope thing will gets better bro.

Dell Zhafry Fuad
Mercedes-Benz W124 Club Malaysia
FB: www.facebook.com/mbw124cm

Posted on: 2009/1/12 19:33
Founding Member
Joined: 2005/3/1
From: section 13 shah alam
Posts: 5999
Benz Model: W210 E230 Elegance
Re: Current leakage - Car cannot start
hello hasniz

sorry to hear abt yr car woes....as mentioned by some members in yr old thread abt changing battery, W203's most common fault is the electric seat control unit malfunction where there'll be a electric current leakage, thereby draining yr battery.

search the forum, its been documented before...hopefully other W203 owners would be able to give some input tonite.


lets build friendship thru knowledge sharing

Membership Number: 6

Posted on: 2009/1/12 20:23
Certified Benzitos
Joined: 2008/5/28
From: SAlam
Posts: 1876
Benz Model: W203 Av, W212 AMG
Re: Current leakage - Car cannot start
bro hasniz,

current leakage problem encountered and solved by one of our members here W203 Current Leakage - Seat ECU

Membership ID: 3089

Posted on: 2009/1/12 20:34
Certified Benzitos
Joined: 2008/1/1
From: Gelugor,Penang / R.Panjang,Kelantan
Posts: 294
Benz Model: C200K W203
Re: Current leakage - Car cannot start
Thank all bros for information.
Can it also casue by the DVD player?. My one is Japan
recond, have DVD player in boot(but now NOT use because of
cannot play local DVD).
What is the consequences if related to that DVD player?

Yesterday is history,Today is reality & 2morrow is mistery!
Membership ID : 2538

Posted on: 2009/1/12 22:04
Certified Benzitos
Joined: 2008/2/18
From: mutiara damansara
Posts: 83
Benz Model: c200k advantgarde
Re: Current leakage - Car cannot start
Bro hasniz...sad to hear that you encountered same problem like me b4.
actually i did post the thread regarding this matter in the forum plus the RM that i spend to fix it. Please browse the forum as i dunno how to link it. Good luck in solving your problem..thanks


Posted on: 2009/1/12 22:14
Wise Benzitos
Joined: 2005/3/26
From: Petaling Jaya
Posts: 4609
Benz Model: W201 ke?
Re: Current leakage - Car cannot start
Posted on: 2009/1/12 22:41
Certified Benzitos
Joined: 2008/2/18
From: mutiara damansara
Posts: 83
Benz Model: c200k advantgarde
Re: Current leakage - Car cannot start
Thanks bro c9...hehehe


Posted on: 2009/1/13 6:54
Just can't stay away
Joined: 2008/10/18
From: UK
Posts: 93
Benz Model: W203
Re: Current leakage - Car cannot start
The battery may be dying for one of a few reasons: it may be that the battery is damaged (a shorted cell) in a manner that even a small draw will quickly drain the battery. it may be that one of the electronic modules is not entering sleep mode and constantly draws considerable current. there may be aftermarket wiring that is improperly installed and continuously drawing power from the battery. finally the alternator may not be charging the battery enough or at all.

A seat control module, may not be shutting down, it has to go to "sleep", if the module does not go to sleep, it stays on causing a amp draw on the battery, the seats may appear to operate as normal but a once the car has shut down, key removed, car locked, the module never shuts off causing the complaint you have.

What a bad seat control module normally does is keep the command system fan on 24 hours.

Normally, once you shut off the car and pull out the key, the fan behind the navigation stays on for about 3-5 minutes(I think) and then shuts off automatically. When your seat control module is bad, it stays on all the time, thus draining your battery.

Trouble shooting:
Maybe try disconnecting one side(I think I have read that the passenger side goes bad most often) and then take out the key. Listen closely for the fan behind the Command screen. Wait 5 or so minutes and it should shut down. If it does, try disconnecting the other side.

Side note: Depending on how long you have this problem, it may also put extra strain on your alternator thus causing it to fail prematurely as well. Best to take care of it ASAP.

Please ask your mechanic about the CANBUS and SAM as well.

Good luck!!

W203-C200K Avantgarde
AMG 17'' Styling III Gunmetal
Lorinser Exhaust System
C55 spoiler
Sport pack suspension

Posted on: 2009/1/13 13:03
Just popping in
Joined: 2007/12/5
From: Klang Valley
Posts: 15
Benz Model: C200K
Re: Current leakage - Car cannot start
Send ur car to bro Adi @ Milennium Merz Shah Alam.. he is the expert in this..

it happend to me 2 mths ago... my front seat control module on driver seat was the problem (current leakage, thus draining the battery)...

If ur car cannot start... take out ur battery and charge it (cost less than rm10).. but if ur battery are dead.. u have to replace it ..... the car will start...

depends on how much the current leakage are, dont left ur car more than 2 days...

hope this helps.
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