My Becker volume control crapped out. Apparently, common problem...when you turn volume down, volume goes up, and viceversa. I'm replacing with Alpine CDM unit(comes in about 6 different versions....depends on whether you want mp3 capability, etc.). VW harness from any stereo shop or www.crutchfield.com works. Only problem is you must lay the CD changer control cable under the console and back to the trunk if you want to use an Alpine 6 disc changer. Factory MB changer will not plug n play to aftermarket such as Alpine.