On my "new" 2007 SL550 (only 13000 miles on it) I have frequent trouble using the CD Changer as it thinks the cassette isn't in place. I pulled the cassette and examined each tray, removed any rough edges on the sliding surface and wiped a bit of silicone lube on the surface. Now it kinda works in that I try it before driving and it might work but if I get that message, I eject the cassette and reinsert it and that usually will get it working and I can drive off. I imagine that the cassette is not exactly in place so the sensor doesn't reliably recognize it. Does anyone have any thoughts on this and know a way to adjust the cassette or the sensor for it?

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