Hi, I recently bought an A3 2.0T S LINE 2006 with Bose, the guy in the dealership added an iphone connection to the headunit at my request.

The front passenger speaker now cuts in and out, crackles and humming noise that gets higher in pitch the higher i rev the engine, the problem seems to be amplified when i turn on my headlights. But will stop randomly and be fine for a few days.

I'm thinking it may be the iphone connection, it doesnt seem to work with my ipod anyway so looks like its incompatible with my headunit. Do you think changing iphone connections will resolve my problem?

Cheers