Bought a 2015 Skoda Roomster 1.6 diesel 8 months ago from main dealer. the vehicle had 19,000 miles still under Skoda warranty. Vehicle given two year service prior to delivery. Two months ago whilst on the motorway the car surged in power and had white smoke from the back of car. After pulling into the safety lane the RAC came out, they thought it may be the turbo, as did the recovery team. The car was taken to main dealer where the care came from.  The following Monday the mechanic phoned to s