Just been out with tape measure (conforms to EC Class II standard of accuracy)
on a level surface with handbrake off and 1/4 tank.
When I had Pro's all round at the rear it was PAS-660mm DRIV-649mm now with the Sportlines at rear it's PAS-639mm DRIV-638mm
Measure without handbrake on as I was getting +/- 5mm with it on!
Also bare in mind that my springs serial number indicate they are for the 1.9tdi/1.6fsi etc with a lower axle weight so they'd probably lower my car more than 2.0tdi springs