Hi Dave, his exact words on his report reads " we have found no comms with OBD, no crank suspected seized engine or internal engine fault, oil level OK, coolant level OK" I understood this was the F10 engine Dave , there were no symptoms, just driving home, warning lights on dash, , Stop Start etc and then it coasted to a strop and just a click when you try to start... AA put his vehicle charger onto the points in the engine bay and it made no difference. No symptoms, just had a new mechantronic unit and replacement gearbox fitted 2 months ago