Dieel engines warm up very fast due to the cooling size and water flow across the engine alone with the thermostat and the electric heater. Fuel economy is usually best with garage fuel and not supermarket fuel we do see 64 mpg on the A3 and A1 the Q5 is now showing constant 38 mpg compaired to...
All my cars A3, Q5 run full S-Line suspension, I purchased a 14 plate A1 S-Line for my daughter and have ordered a set of s-line springs as she prefers the s-line set up and the sport springs are being removed.
why not throw in HHA hill hold assist great option at a low cost wish I did this option, works great with the electronic hand brake. Once the hand brake is released the HHA comes into operation.
I have the A1 1.6tdi and the A3 2 litre both S L-Line both cars return the same MPG depending on the way you drive them, you can get he 60MPG but that is at low speeds and gear selection then you can have 30 MPG when having fun. So basically the engines are well sted to the cars.
I did comment on this in a previous post and if I remember you will find the full explanation on page 69 of your manual. This switch has to do with being in economy mode and going to pass something you can push through the button to get the extra power to pass.
The 150 HP engine in the A3 is a fine match for the car, I have the manual box, this is just to keep all vehicles the same when we jump into another car.
I may have liked the 184 but again the 150 does everything for me and the wife no wheel spin out, and the Q5 for everything else