What amazes me is they told you the replacement was bad. Don't they check your repair history before giving you a diagnoses?[/QUOTE]
Clark, to answer your question yes they installed a used part(they wanted $1400 something for a new one,$600 something for a used).We picked up the car the 1st time drove it 2 miles to a gas station for fuel,it was still showing the same symptoms,we thought we would run a tank or two of gas through it and see what happened.Took it back again 2 weeks later when we picked it up same thing,that's when they told us it was a bad throttle accuator.Decided then that we would not take the car back to MB would do it ourselves.