Good info - Thanks. My sunroof is the simple older style that only retracts. It isn't capable of raising the rear up for venting. Question about the hand crank. I did try the hand crank. I found the little adapter that fits into the motor assembly(?). Is there some other part that I'm missing? What turns the adapter? Am I supposed to put some pliers on it to get it to crank?

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1979 300SD 83k miles Astro Silver Metallic/Black leather #3447
1990 350SDL 202k miles (3L engine from an 87 300D)Black/Grey leather
2006 Pleasure-Way Class B MoHo (Sprinter chassis) 134k miles
2005 E320CDI 270k (car is sooo fast - I can't believe it's a diesel!!!)