HELP!!! Please - my brother has replaced everything we can think of. '87-300E 182,000 miles, had it a few months ran fine until about a month ago. Started losing power at high speeds, low speeds, at idle anytime you name. We replaced all the norms, plugs, filter, distributor all bosch products. Still was stalling. We then replaced OVP relay (thank you to folks on this site for that little tidbit). Car ran fine for one week - what I did notice during that great week was that it wouldn't stall, but it would surge to real high speeds and then check back. Finally after a week of this the car idle dropped extremely low (5rpms) and then you guessed it it started the same problem again stalling when it felt like it and then not restarting until the car sat for 20-30minutes - in rush hour traffic blocking the slow lane. So we replaced the fuel pump relay twice and now just recently replaced the ovp again as well as the Klima relay - now I'm being told to replace the ECU which I can find on ebay for about $100. Help. Every mechanic that has tried to recreate the problem can't and Mercedes wants too much money to look at it and suggested I just start replacing relays. Otherwise car is great. FYI the cruise control does not work and the blower for the heat went beserk one day and wouldn't turn off so the Transmission folks that had my car at that time disconnect the blower. I do know that when I first purchased the car it would start and then ref real high and then you would push on the gas and the car would do nothing and you would coast to the side of the road stop and turn the car off and then restart it. The tranmission place I took it to said that there was a "cord" that was overstretched and they replaced that and the car ran fine after that. Could this cord be overstretched again? Do I need a new fuel pump? I've heard mixed stories about whether or not you need to hear the fuel pump running. I do hear when I turn the key the OVP run really loud for a few seconds and then I start the car.