I have a 2008 W204 C220 CDI Sport, and although the car has been into the Mercedes garage a few times, I strongly suspect they have never applied the Engine and Auto 5g Transmission software updates. Fuel economy is not good and I get the terrible lag when pulling off at junctions. Is there a way in which I can tell if the updates have been applied ? How much should it cost to have them done ? I'm a little peaved about it really, as I took it in a year ago for software update to be applied to the NAV, and I asked for any other updates to be applied, but I really think they didn't do it. The car is now out of warranty for 3 months, so i might have to go back to them and be awkward about it.