Originally Posted by ptcruiser
The dealer is your only choice for a new key.
Be prepared for a shock...
I just overcame the sticker shock. OP, my key fob remote functions didn't *always* seem to register, and it got to the point where I HAD to be meters away for it to function. I also noticed that once in a great while I would have to reinsert it into the ignition as it wouldn't turn. This was about a year before it just quit registering altogether (remote and ignition lock) leaving my car parked in the driveway and the sunroof stuck open. The tow was complementary, and the $450 dollars it cost me was completely in vain once the service department pulled my car up. The negligent tow truck operator Mercedes sent to my home put an $1,100 dollar dent just underneath the driver side tail light. Currently battling it out with customer care going on two months now, I'm ready to either start a claim with my insurance or just sue. I honestly don't care at this point, I just want it fixed!