I really don't know the answer to your problem, but I would be willing to help you figure it out.
Do you notice anything else not working? Does your car run ok? Can you shift it into reverse? Does the fuse only blow when the parking brake is on, or does it blow all the time. Do your reverse lights come on when you put the care in reverse? Since the fuse description sounds like it controls mostly the things in your center console, I would assume you need to look for problem there.
My caveat is that I have only driven my SLK for a day, so I may not be the right person to be listening to.
Current Car: 95 SL 320
1998 SLK 230 Kompressor
1991 190 E
1985 380 SL