They will definitely deal, and fairly deeply. I'd offer somewhere in the neighborhood of 90% of sticker and be prepared to walk away. There's currently a $1500.00 rebate as well as 2 years maintenance as incentives.
I was quoted:What are you guys paying for the extended warranty??
I had it go off in the C class loaner I took to school (I'm now Mercedes alignment certified) but it was after driving 4 hours after being in class all day. It was due. I took a break, leak and hit the road again. All good. Not a bad feature.I have had the driver alert go off on me. I will tell you that it is highly accurate. It is not time based, it really does correspond to your ability to safely drive. But I frequently drive several hundred miles in a day, so...