Aivar1988

For the central locking issues check the wires for both front doors. Had the same issue with random locking and then not locking at all. Drivers side wires were broken. That brown connector is for the central locking.

I really don't want to go offtopic here, but I was in the understanding, that every electronic "comfort" accessorie of the car, including the power windows, go through this module AND one time, the windows stopped working after another short circuit episode, with the instrument cluster dark for half a second. Looking back it was another rainy day and I had my wipers on. I will address the power window problem in the proper thread.

Just wanted to thank the OP! Changed the relay yesterday and this job is not for beginners. Use a soldering fan or bring it to a professional. It is very difficult to get the old relay out with only a normal soldering iron and it's easy to damage the two sided board. With the help of a desoldering pump I got only 4 legs out of 10 cleared. The rest I had to heat one by one and push the relay out until I was able to cut the legs between the board and the relay. TOOK ME HOURS! Comfort module: SIEMENS 6Q1 937 049 D Relay: TYCO V23084-C2002-A403 New alternative relay: HFKD012-2ZST The old relay still worked, but it was short circuiting very rarely, making the fault diagnosing difficult. I opened the old relay and you can see the slightly burnt contacts (I bent it to take the picture). I have owned the car for about 2 years now and this relay has been driving me crazy the whole time. I could hear something short circuiting and even dimming the instrument cluster for half a second and I couldn't figure out what was causing it, as it happened only a couple of times a year and the wipers kept working. Adding the not working power windows to this electronic mess (my next mission), it really didn't help me finding the source of the problem. I have even opened up the comfort module once before to check if there's any moisture damage, while trying to fix the power windows. Finally I realized, that the short circuiting sound was occurring while the wipers were on the intermittent speed and working for a long time. I quess the contacts heated up or something. So after reading this post about the problematic wiper relay, my car has now one less problem.