As usual Steve, you demonstrate your complete knowledge of Mercedes. As a former foreign car mechanic (in the late 70's) let me express my gratitude for your advice and my respect for your knowledge and ability.
Makes me kind of wish I had stayed with it................
1986 560SEC: 150,000 miles, runs great, but I've got to sell it (too many cars for one man)
1987 560SL: 122,000 miles, used to run poorly, now (thanks to forum), runs great!
1997 GMC Jimmy: Turned out to be a turkey.
1989 T-Bird Super Coupe: 150,000 miles, still runs great. Ford got it right.