Electric windows in Mercedes B Class 2008 not working properly: advice needed

Hi, I had a similar problem with my 2011 Mercedes C Class, the power windows were acting up just as you describe. It turned out that my car battery had serious problems and was no longer supplying enough juice, hence the error when programming the power windows. The solution was pretty simple, but still necessary - replace the car battery. It's not necessarily serious, but when the battery weakens, it can cause all sorts of electronic problems. I would recommend getting the battery tested before you start looking at other parts of the car. Good luck!

(Translated from German)

Hey, thanks for your quick feedback. I wouldn't have guessed that about the battery - good to know! By any chance, can you remember how much you paid for the battery replacement back then? And have you had any other issues come up since then? Cheers!

(Translated from German)

Hey, sure, no problem! So, it cost me €290 to change the battery. I know that's a bit expensive, but since then everything has been running smoothly again. Especially the thing with the window regulator activation, which worked perfectly after the visit to the mechanic. No further problems have arisen since then. I think it was really the weak battery that caused the trouble. Good luck with your Mercedes!

(Translated from German)

Hey, great, that really helps me a lot! I will definitely have the battery tested and then hope for the best. Changing the battery isn't exactly cheap, but if it solves the whole problem, it would be worth it to me. I really appreciate your help and feedback. Hopefully I'll have just as good news after the mechanic visit. Until then, thanks again and take good care of yourself!

(Translated from German)