I rang up Mercedes 2 weeks ago to get my car body work inspected, fire opal red, usual problem, blisters and flaking lacquer. Arrived at the showroom, took the keys off me, 3/4 hour later they come back to me and say " we've done the two jobs, we will let you know on the paintwork." I said it only came down for the paintwork inspection. Turns out they did a software upgrade to do with the emissions I think. Not very happy with this, they even disconnected my dashcam so I couldn't tell they had been under the bonnet. Is this the right thing to do without my permission?