New informaiton: Happened again tonight and the best way to describe it is that the brakes completely lock up and then if I sit and wait long enough with the car off, it seems to clear itself.

Hello- I have a new (used) 1987 Mercedes 560SL Automatic, with 78k miles on her. The other day, I was driving down the street and she started slowing down and it became harder to accelerate altogether. I pulled over and turned the car off. After a few minutes, I started her up and put her into drive - she wouldn't move. It was as if the brakes were on. I waited about 5 more minutes and tried driving in 3rd and 2nd gears and she finally picked up again as if nothing had happened.

The guy I bought her from said that he knew the fuse blew when the fan was turned on, but I bought it anyway for a price reduction. I didn't even look to see if the fuse was blown. After the incident above, I looked and fuse 7 was shot.

It continued to drive well after that until today when I finally replaced the fuse. It drove normally for about 5 minutes and then I noticed the power coming down again just like before. By the time I got to a place where I could pull over, it would barely go. Turned the engine off and waited like last time. I noticed the fuse I had just put in was blown. This time it took several tries to get her back to moving easier. A few starts and stops, with trying it in different gears got her going a little better each time until she finally felt like something freed up and she was fine again.

One thing I did notice during all of this, at some point, is that my break pad sensor light came on for a few minutes, but I don't know if that's related or not.

Anyone have any ideas about what this could be? I know fuse 7 controls a lot of things, most of which an amateur like me sounds like it could be the cause, which gets me nowhere.

Help for a newbie, guys?