I just picked up my new Bluetec, my second and drove to Washington DC. Got 8 liters per 100 km which was even better than my 08 which got about 9ish on long trips. My milage has now gone to 10 per 100 km for no apparent reason in similar driving. Any guess? Also, my electric fan sometimes runs for 3or4 min after I shut car off, never did this on my 08 , is this normal?