I have a 1998 SLK230 prewired for a cd changer. Just bought a CD Changer for it and I'm wondering if I should have it installed or could I do it myself. From what I've read, it looks like it just needs to be plugged into the cable in the back of the truck. But what about mounting? Are there predrilled holes or do I have to drill? Where should it be mounted? Does the battery need to be disconnected before I do any of this? Or should I just leave it up to someone who knows what they're doing and pay for install?

Thanks!