MERCEDES W124 POWER WINDOW problem

[rushikesh]

Having an issue with all four power windows on my MERCEDES E220 PETROL W124 CHASIS. The power window main unit works just for few seconds went we crank the car up ! but eventually it gets cut off and windows stop working !
Everytime I crank up my car the windows work for like few seconds and then dont! What could be the possible issue ? I have checked all fuses. If there is a relay then where is it located ?
Thank you in advance

 

[optimusprime]

.You will see 2 fuse boxes that look the same one at the front holds the bullet fuses one at the rear hold relays . Now the picture is for location only the parts in there may or may not be the right ones for your car but the location is .And after all they might be the same you will need ti inspect them first .

 

[Habil]

Also the comfort control unit is under the back seats. Can you hear any noises like a relay there?

Here is a link with a lot of workshop manuals Model 124 Maintenance Manual Index

 

[optimusprime]

Dont have a comfort relay under my back seat that i know of ,but rest assured i will look the nnext time i am out . But looking at the old trusty manual thats where it is . The one i posted was for the 300E W124 .

 

[wrdcc01]

Check these fuses (not blown and contacts clean and tight): Fuse 2 and 3, these power the Convenience relay which is furthest back on the left of the relay box. If they are OK and you can hear a click when the ignition is turned on then move on and check fuses: G and H. These get power via the Convenience relay contact with ignition on or drivers door open. If they are good then check Convenience module for ground at Plug A pin 2, ground at Plug B pin 7 and power at Plug E Pins 2 and 3 which are the feeds from fuses G and H. After that, if all is OK then it is likely a module fault.

 

[Deadly Dave]

If the suggestions above don't solve it then I would check the wiring. The wiring across the bulkhead in my friends 220 coroded, the insulation was OK but the copper dissolved.
Also it's good to fit copper fuses if you don't have them already.
15 x 8 16 25 Amp Bullet Torpedo Fuses Copper Brass BMW Mercedes W123 W124 W126 | eBay

 

[optimusprime]

Also some windows are incorporated in the aftermarket alarm systems . Like fully closure .Only an idea .