Been having problems with my 99 SLK hardtop. Been to dealer twice, with a total of 9 hours spent by technician trying to figure out cause of hardtop failures and these failure codes, but to no avail. Dealer finally recommended replacing hydaulic unit and 2 hydraulic pistons, but could not even guarantee that this repair would solve problem. This left me very unsatisfied with my service experience at a luxury marquee dealer. Even though my car is 5 years old, it only has 31.5k miles on it, so am very disappointed that the hardtop is already malfunctioning. Going to a second dealer to get a second opinion. Living in northern cali, it sucks driving with the top up with the sunny, but cold, weather we've been having!

My personal guess is something is jamming the linkages causing motors to overload that leads to fuse for hydraulic unit to blow. Told this to service rep at dealer, but think it went in one ear and out the other. I don't plan on being a repeat customer there, that's for sure.

Just venting....