Took my 93 500SEL to get new tires put on last week and get a front end alignment. Now that we got the car back the cruise control doesn't work.

Is there some little cable they may have inadvertently disconnected thats keeping the cruise control from working that I can hook back up myself? Some other easy fix or troubleshoot that I can do to figure out whats wrong?

And I don't want to have to take it back to them because I wasn't very pleased with service they offered and I'd rather not have to deal with the sun-of-a-guns unless absolutely necessary.