M.B. DOC: Once again, thank you!
Richard: Thank you for your advice.
I was debating whether to take the car to an independent shop or to the dealer, but now I am certain to take the car to the dealer. All of your advice and suggestions are well taken and I do appreciate the discussions. I don't want to go down that long and expensive road to fixing the start and idle problems because I am not confident that my independent mechanics are familiar enough with this car.
I will post the results later when the car is fixed.
'87 190E, 2.3-16