We have had our 88 560SL for a little more than six years now. It is my wife's daily driver. Today it died on the highway on her way to work. I managed to get it home, it would run for a couple of miles, die and restart again after cooling for 3-5 minutes. It has all the symtoms of a fuel pump relay failure. The thing is that this is the 3rd FPR to go bad. The one that lasted the longest is the one on the car when I bought it. Car would die when taking a right turn. With the other two the car would just die, they lasted about 0ne year/year and a half. Is this to be expected? I bought one FPR through the internet, the othe other from a local parts store. They both were the exactly like the original. Am I buying bad parts? Any suggestions befor I buy another one?

Thanks.

Jl