Hadi Pourmohseni bought one of the most expensive supercars in the world, a $160,000 BMW M6. br br He expected to receive the best of German engineering, but instead was left with a bad taste in his mouth after mechanics in Italy and Germany couldn’t or wouldn’t fix his defective car. br br As a form of protest, Hadi had his Beemer delivered to the Frankfurt International Motor Show where he and his friends smashed the faulty car with sledgehammers and an ax.