Fess up time. A few weeks ago on the M5 my Merc all but ground to a halt - on kickdown the gearbox wouldn't change down again, it jammed in neutral. Scary. Cause was a drain plug had come loose and the gearbox had lost most of its oil. I dread to think where it all went and what might have happened.
But it wasn't deliberate and I didn't know about it. Honest
