Yes. My 1989 500SE has the same problem ASR light stays on, gas pedal is hard to depress however I can go 240km per hour with it. However I get lousy gas mileage. Found out that it will cost me 5,000euro to get mine fix. NOT WORTH IT....
Try pumping the accelerator pedal 3 or 4 times before you start the engine. I'm not exactly sure why this works on mine but it does. I also think that the ETA is bad on mine and needs replaced, but I don't have the money. You might want to do a search on this section for a rebuilder. The cost is MUCH lower that going through the dealer!
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