I just bought a 2005 S4 Cabriolet with a 6-speed manual transmission. My A4 Cab of the same year has audio volume controls on the steering wheel - the S4 I purchased does not. I've seen Audi Sport steering wheels that have volume controls and paddle shifters - my question is can this type of steering wheel be retrofitted into my current car to replace the existing one? I am less interested in the paddle shifters, I just miss the steering wheel volume controls. Can an A4 steering wheel be put on if the sport wheel won't work? Thanks, I appreciate any feedback someone can share with me.