Or all three? I'm interested in your opinion. Should I just replace the switch which I suspect, as have others here, to be the next probable cause of my occassional stumble/stall issue? Or since I'm "in there", replace the housing and cylinder as well? My vehicle is an 88' 560 SEL. Aside from the stumble/stall issue (two years now!), I noticed twice over the last two months that I had to manually turn the key left due to the starter staying engaged after release of the key. Additionally, the radio stayed on yesterday after the ignition was turned off and the key removed.

Thanks ahead of time for your opinions. I bought the 88 560SEL because of Mercedes' engineering but I keep the car because of the incredible expertise of the members of MercedesShop! Thank You!

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Woody