I live in constant fear of my sunroof crapping out on me. It moves slooooowwwwllllly (unless it's really hot); I have to help it along. Rails are clean/greased....I'm sure it's somehow dirty in the inner workings. Cleaning it properly is above my pay grade and too expensive for me to pay someone to do. I know I'm living on borrowed time.

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 159k miles
06 E320 CDI "Rutherford", Black on Tan, 179k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 145k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 77k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife