I wonder if anybody can help me. My 2006 W209 has a NTG2 unit with built in Ipod & Bluetooth connectivity but I do struggle to use it as I do not have any instructions on how to operate it. It usually done by guess work. NTG 2 operation manual does not include this information. I wonder if it is an add-on unit. Ipod is connected via a USB connector in the armrest and bluetooth does not use any adapters in the armrest. If anybody has any info on this it would be much appreciated. Thanks