I just replaced the wiring harness (which was hard and brittle) on my 93 400E. I started it and it drove flawlessly for 10-15 minutes and then did the same thing as before. It started losing power after that warm up period. The idle was normal at a stop sign, but when I gave it some gas, it barely went, and when I kept the gas pedal down about half way it would suddenly recover power and surge ahead. What is wrong with this damn thing? Is there a way I can troubleshoot it to see if the throttle actuator is bad too? This is my first experience ever with a Mercedes
Benz, and may be my last. This car has only 88,000 miles on it. I have owned this car for a couple of months and it has been great until now. There seem to be some really knowledgeable techs on this site. HELP!!

Garry
400E
735i
635csi