on my lighting relay (the big dual relay that lists for 150 US) the magnetic switches had developed cracks in the solder joints. I was able to resolder those and it continued to work for more than another year!

I have an 89 760 turbo and I had my mechanic replace the intank fuel pump twice in 6 months. I bought a new striebel fuel pump relay about a year and a half ago and it has worked fine since, but I am having the same problem of the car failing to start when it gets hot again after an hour of driving ...