Hello together, after I froze last winter, because my heating did not work, I decided last week to venture to the project heating => heat exchanger switch. After watching various videos on the topic I then successfully completed the change last weekend (slip 10h). Now unfortunately the big one but… This morning I had to realize that my windscreen wipers at the front no longer work, but the wiper at the back and also the wiper water pump/ nozzles work at the back and at the front. I have no idea where, how, what I forgot? or possibly damaged. The fuse in the engine room No.17 is healing. I hope you have ideas!!!