Does this cleaning of the motor apply to a 56 plate A4 ? I took my roof down a few months ago in very cold condtions, maybe only 2-3 degrees as I was shifting some gear. The roof never came back up and I had close it manually. Now when I try to open the roof it only dis engages a couple of inches then stops. No sound comming from the motor. Does this sound like a knackered motor, or will cleaning fix. Either way, I want to avoid a £500 Audi bill.