I had some troubles with the 80A mainfuse lately on my 520i 1990 (E34). several electric malfunctions apeared.After replacing the fuse(near the battery)and putting my doorlocks back in to sync. everything seemed to work okay except the reverse lights and the electric mirrors.I checked the reverse gear switch and fuse 12,they both look ok. Does anyone of you guys can give me a clue? Wim- Netherlands.