Keyless go help?
My fob was doing the same thing when i first purchased my car, so i got the previous owner to sort it out before i took the car. Apparently he went back to Mercedes and was told by the tech that it would need new batteries and then may need re-programming to the car. Fortunately for us the new batteries did the trick and it not require anything else. Maybe yours needs re-programming back to the car.
Curiously though, mine has started doing the same thing again for the last week or so, fresh batteries has cured it but it still does it every now and then. Sometimes i think it might be something to do with the brake pedal. Can you switch ignition on with your keyless fob, thats pressing the start button without having your foot on the brake pedal.



