I've just popped on here specifically to check this problem out before bed.
Tonight has been the second time its happened on my Cooper D, although the first time I dismissed it (and it could be heard inside too!), its about 7°C outside and I only drove from work 4 miles down the road (which at 11:15pm meant no stopping for traffic).
I asumed it was something to do with the turbo (although I had no idea really what it was). Going to phone Robert Stern in the morning and get it looked at....that and my faulty alarm, funny vibration and tempremental gearbox
