I had an awful experience with the Conti sport contact 5 P on the GLE400d(rear tyres 325/35/22). The bloody things only lasted 3 months/6k miles! Bearing in mind that the car is 4WD as well. I couldn't get hold of the Pirelli P Zero that were on it originally(they lasted 20k miles), so that was how I ended up with the Contis. I've now got MPS4S on it and the Michelins are doing alright for wear up to yet, but it will be interesting to see how many miles I get out of them though. Hopefully they will do similar to the Pirellis.