iPhone 4s and pairing with bluetooth puck problem
First up I'd like to say I have done a search and can't seem to locate this very specific information, so please, if I have missed a thread / the answer, forgive me and point me in the right direction

Ok so - i have a 2007 CLK 350 (W209) with the bluetooth system - I have the B67875878 bluetooth module/puck in the centre console (that's the older, black/silver one).
Unfortunately I cannot get my iphone 4s to pair with it, at all - the iphone bluetooth screen just spins and says "Searching" never actually finding anything.
Has anyone had any luck getting this to work? Would really appreciate your help - pretty damn frustrated, from what I can gather using my awesome google skills - it seems to be something to do with Apple and Bluetooth 4.0 - although then there are success stories people saying 'I've managed to pair it, just press the button and it pops up blah blah blah'
Thanks



