Date registered: May 2005
Vehicle: '07 GL320CDI
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Quoted: 2 Post(s)
Here's your first big challenge:
Your car is old and the original stereo is two-channel and the original wiring is for that.
ANY radio you buy in 2011 will be 4-channel.
This means you will NOT use the fader switch in the console but rather the built-in fader in the new radio and this means you'll have to cut wiring for rear speakers from the original fader switch and connect to the new radio with some additional wire.
Your Mercedes dealer can get you an inexpensive blanking plate to cover the hole left by removal of the original fader switch.
The original speakers are metric sized (not inch sized) so easiest replacement of at least dash speakers is accomplished with speakers made for your car.
Last edited by lkchris; 04-11-2011 at 11:35 AM.