Hi Kevin,

Yes, you can use any amp you want then. You can control a Blaupunkt CD Chaner with the Toronto for alot cheaper than the factory MB radio if you dont like it. As for the CD Changers price $850.00 installed and the factory digital MB phone is about $1,500.00 plus and extra $480.00 if you want voice activation. Hope this helps you out!

Jim LaPlant
Factory Trained Mercedes-Benz Technician