Hi Guys sorry I have alredy posted this in my "W211 Electronics matching PLEASE HELP!!!" and I had no response, so sorry for opening this thread but I had to!
Here is the link to that thread because of the pictures and everything. https://mbworld.org/forums/e-class-w...ease-help.html

I have replaced the BCM and TCU with new ones as shown in the pictures from the thread above, Connected everything together and I mean the full Interior.

My car batteries are close to completely dead (they don't hold the charge for long,but they do recharge,and after turning of the car and starting couple seconds later is starts normally but if it stays over night tomorrow won't start even do I take the positive clamp of before).

I started my car with an help from my friend (with cables connected to my battery),and it starts. First time starting shown me the gearbox status (P l Kilometers l S)and it didn't before BCM and TCU replacement, and short after couple of seconds it didn't, and it doesn't anymore, only kilometers stayed. It also displays the Display malfunction but that was showing before BCM and TCU Change.
Btw instrument cluster was never near the water.

So i put the car in reverse and it moved about five meters,and stoped. My throttle response is very Weak like 1050 rpm but no throttle response not even in neutral.
Only normal throttle response is when I put it in P (Parked). Then everything is ok and it can go to max.

So I turned it to neutral and pushed it back to parking place.

Btw my emergency brake blinks on instrument cluster from time to time.

One more problem is that my radiator fan runs all the time,and my ac or heating still don't work (they have signal but wont blow,and they blink),my steering wheel buttons don't work at all, and my windows need a number of times pressing so they close 0.5 cm at the time (i press 10 times so they close 0.5 cm).

Does anyone know what to do,is it just about resetting error codes or something else.

I am really desperate and cant wait to fix mi Mercedes so PLEASE HELP!!!


Thank you in advance!

 

Start with the known issue: Replace your batteries. These cars really like good batteries and will exhibit any manner of odd behavior when the batteries are bad.

 

Thank you I will change both batteries, and while I was doing everything I removed both of them so it was completely out of power for weeks.