Mercedes Repair Questions? Ask a Mechanic for Answers ASAP
Hi, fuse 73 in the rear fuse box behind the passenger seat is for the hydraulic pump motor. I've attached a picture below.
Have you scanned and erased fault codes?
It's possible that the pump overheated but you should be getting some sort of fault codes. I'd try manually raising the roof and see if it will operate after you move it.
Sorry for the wait I was off work on Friday and completely missed your reply. Yes you can briefly bypass the relay to see if the motor runs. Remove the relay and jump from terminal 30 to 87 in the relay connector plug and the pump should run.