I use my iPhone in the Renaultsport Spider, together with a BlueTooth in-ear headphone set. I use TomTom which works perfectly with streamed A2DP music for those long Euro drives (we do an Alpine Gordini rally around Macon each May - utterly brilliant!). I am also looking for a powered mount form my new M3W - neatly wired into the mains as it were, rather than via the cigarette lighter socket - which I think will mount up in front of the steering wheel. I use a waterproof case called LifeProof, which us pretty robust and protective. Key though is the BlueTooth headset - mine is from Sony, but lots of folks do them.