In September 2010 I ordered a Volvo XC 90 D5 with 200 hp (also according to the contract). 5 days ago the car arrived in the car dealership, but it only has the 185 hp engine. My salesman offered me to increase the performance to about 210 hp by means of software tuning, in a way as a reparation. Does one have the experience with this kind of tuning? Does this bring something? Does this change some of the consumption values? Moreover, the old engine only has the Euro 4 standard, the new one however 5. What would you do? Accept the offer or insist on fulfilling the contract? Thank you very much for your help!!!