Hi,
And welcome to the fascinating world of topdown driving (or contemplating it, anyway).
Main differences between 07/08 and 09 are:
1) TDI is a common rail (CR) in 09 models, and Pumpe-Düse (PD) in the older models. This has significant effect on the engine noise, to some extend on the power delivery, and a small effect (beneficial) on economy figures.
2) 09 models get the upgraded entertainment system (5xx series) which means colour touch screen double the size of the "black and white" old units (3xx).
Other than that, to the best of my nowledge, we're looking at cosmetic differences, e.g. the shape of the rearview mirrors (external).
Hope this answers some of your concerns.
Seeya,
Michael
MY08 125 kW TDI Wagon
PE Black, Sunroof, iPod
MY09 CR TDI Eos 6-speed manual
Candy White, black leather, Sports suspension with 18" Chicagos
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