Warren - Fastlane has engine mounts for $82 each. Thats two for $165. It takes about 30 minutes to install them.
I shop around for parts. This site has some good prices on most stuff. Mercedes shut down the dealership in my area and two of the mechanics that worked there set up their own shops. Competing against each other. I try to do all mechanic work that I can myself and stuff I can not handle I take to them. Can't wait until the 140 Service CD comes out. Should be able to do a lot more myself. Try some repairs yourself. You would be surprised how easy some are. The closing assist pump was a piece of cake after I figured how to take out the trunk liner. The plastic rivets had me stumped. Just remember, you can't tear up anything that old money and new parts won't fix!