Hi guys I want to install a pioneer touchscreen app radio to my merc . My question is would it still function with the steering wheel button for on call and off ?
http://www.halfords.com/webapp/wcs/...&productId=991017&categoryId=165655&langId=-1
http://www.halfords.com/webapp/wcs/...&productId=991017&categoryId=165655&langId=-1