My manual Plus 8 is now 18 months old with 3000 miles on the clock. 450 of those were done over the weekend on a trip to Somerset which was hugely enjoyable. On the return journey, however, when backing off the throttle on to the brake or vice versa at low speed in either first, second or third gear there is an audible clunk. I will certainly get the car looked at whilst still under warranty but wondered whether any of you have experienced this and if there is an easy fix ? Any help will be much appreciated.