A few years back my mates mate, bought a brand new beemer from the dealership.
I phoned him up a couple of days later pretending to be the guy from the garage . I asked him if he was happy with the car etc etc . He said he was very happy with the car and sevrvice he was given at the dealer ship.
I then proceded to tell him that although its a great car there has been a recall on them for the brake solenoid (if there is such a thing) . I told him that it would be fixed free of charge and take less than 30 mins. I also told him the car was perfectly safe if driven no more than 30mph .
He lives 50 miles away from the dealer and its mostly motorway , which he drove at 30mph strictly . When he got to the dealer ship he had an interesting conversation with the sales boss (who i had pretended to be)
