Day together, I’m back. After a few years with a TT8S roadster I’m back at the SLK. Again in blue the last model R172. he has the panoramic roof unfortunately no Magic Sky which I find very nice. I would like to seal it and polish it. Does anyone know if it is “real” glass or is it plastic? Glass polish and sealing I probably have what works very well on car glass side panels. In this model with Command 20 and Navi NTG 4.5 funktio The Ipod Touch is very good, even the covers are shown. Now the Krux with it. Next entry I can select with the arrow keys. Only if I listen to an album I can not select the next title he then jumps on to either the next album or also individual title. Unfortunately I have no instruction for the command 20. Greeting from Essen Thorsten