Thanks for the replies!

So I shouldn't have too much problems in my Lupo, the rattle still depends where I'm driving. If it's on luxembourgish or german motorways everything is fine, but on some belgian ones...oh dear! I guess if I shut down the player where there is much rattle, there shouldn't be any problems at all with the HardDisks as they aren't working anyway. I would only have to check the connections as you said.

So now I hope to get my relatives convinced too...They aren't so happy about the fact I'm buying the player over the net :-( It seems it is an unit bought when they were really cheap, just before the shop was closed; it was never installed, just checked if everything is okay. Should be okay, I presume.