I have had a lot of questions about charging a 3G iPhone or a newer iPod in our cars. The iPod/MP3 interface cable that comes in most of the 2009 and 2010 vehicles will NOT charge the 3G iPhone and the latest iPods. However, there is a new accessory cable that will. I tested this cable in every 2010 in my showroom and a 2009 E-Class and it charged a 3G iPhone every time. Make sure you have the removeable cable with a plug on both ends. The iPod kit, with the white iPod connector, is different and can’t be swaped over.
Part number is A 001 827 84 04 and the Mercedes-Benz suggested retail price is $67.
Thanks to Fitz in Tampa for doing the first test…I hope you are enjoying the SL!