Diesel consumption at XC70 D5 BJ 03/2012

Hello all, I bought a 4 year old XC70 D5 with 215hp. According to the manufacturer, the car should consume 5.6l in a third mix. I realize that this will be very difficult to reach. Today I drove the first km (2x10Km) highway and some city (2 ampelstops). So the engine was warm. The boron computer now shows a cut-through consumption of 10litres. Can be that. I drove absolutely human. He car stood 4 months at the dealer. He has 80tkm and makes a very well-kept impression. A customer service was also made new. Oh yes, and the car has start-stop automatic. Actually, he should go out after uncoupled at the traffic lights, but he doesn’t. Who can help me? Greet Tom