Hi, I have a CLK 550 and am looking for a solution to play iphone music through my car speakers and maybe bluetooth my phone. I've bought cheap $10 fm and bluetooth transmitters from ebay but the quality is poor. I don't want to spend $500, but happy to spend around $100 for a good solution. Advice please!

 

Your 550 radio should have an auxillary audio input port. Go to Radio Shack and buy a male / male 3.5 mm RCA cable shorter the better. Plug on end in the radio port, the other into the iPod's headphone port, and choose AUX on the Radio

enjoy!