Well I went to the dealer again today armed with the new information about the relays, but, not surprisingly, they said that their computer schematics did not indicate any such relays, including an "Engine Management Relay" for my model year car. They said they would need the car to do a diagnosis on it, even though they had the VIN number, to detemine what is faulty, and after spending so much time on the car, I just gave in. The car was flatbedded to the dealer via MB roadside service, but I gave them strict instructions not to do any service other than diagnosis without first calling me. Once they ID the problem, depending upon what it is, I may find it less expensive to have the car towed to my house so I can do the repair myself, rather than face the possibility of being gouged by the dealer, but then again, I may just have to bite the bullet, as it is COLD out . . . .