Hello, after reading so much about zottel here I drove 450 kilometers to him with my problem, my navicomputer had given up the spirit, in my workshop on the spot I was offered only one exchange, which would have cost about 1000 euros. zottel his partner expanded the part and found the error, it was only a solder to renew, that did not cost me 100 euros. and where I was already there I invested the saved money in a small tuning 🙂 after we were finished I am a few kilometers further to refuel, and there I filled 40 liters benzin instead of diesel (did not refuel in more than 20 years) my first call was of course to zottel, he could help me further and pumped out my tank in front of place VIELEN DANK again for your help! I will definitely drive back to zottel if I have a problem!!!