If you're needing an excellent independent shop in Lincoln, I'd sure recommend Fayad Auto Service. Mike Fayad, the owner is very familar w/ MBs, gas or diesel, and has done work for me for 20+ years. I do most of my own work, but if I'm in a jam, or short of time, Mike gets my work! His phone number is 402-421-3455.
The MB dealer in Lincoln is Husker Auto Group. I've read many posts here on this forum where the dealer is referred to as the "stealership". I've never used their service dept, but for parts, these guys do fine by me. Parts prices aren't terrible, and I've always gotten the correct part the first time! I deal with Kyle and Ryan there. They give a discount to MBCA members.
Give these guys a try if you need parts or service!
-Russ