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Sounds a bit low on MPG, however this varies hugely, I can make mine shift a good 5 or 6 depending on driving, and with you being a new CGV owner (I've owned 2 now) getting the sweet-spot is sometimes tricky! As crispinchurch touches on, are you calculating yourself or using the built-in trip computer? Going completely on trip computer I'm currently on 26.7 mainly as i'm doing 30-40 minute trips at a time (dual carriageway all the way) and haven't done any town driving. Literally all I need is to do a few kids school runs (10 minutes trips, through traffic lights, speed humps, etc) and that'll drop well below 24 usually. Assuming you're auto here too (I've got the 2.8 CRD auto) is it doing a lot of shifting between gears, or typically does it stay smooth? If it's shifting a lot might be worth checking the auto fluid, make sure it's ok as lost of shifting will impact economy. And finally, is your aux heater always on? (The three wavey orange lines to the top right of the top instrument cluster). This uses diesel to heat up the coolant to help on cold mornings, if the aux heater is always on (Like after 30 minutes driving still on) and it's not mega-cold (less than 5oC) then there may be a problem with the engine thermostat being stuck open and the engine running very cold, which also affects the MPG. Temperature should normally go up to 1/4 to 1/2 within 20 mins of driving in cold weather, less in some cases. Hope some of that helps!