What a great Technic model! Over 2700 pieces. All details here: http://brickset.com/article/20854/technic-42056-porsche-911-gt3-rs

Getting this into MB won't be easy, I guess. I've seen 8 custom parts. In addition to other ones possibly not yet in the MB library. A BOM has not been published yet, but it might be fewer missing parts than for the Mercedes Benz Arcos, for which I've counted 20. But this monster is going to be 300 bucks - likely the same amount in EUR than in USD... Phew!