Folks, Im looking at a B8 with the 2.0T as the next purchase, however Im a bit confused as to the different variations of the engine. Can anyone tell me what date the newer engine was introduced with start/stop technology? Are there litterally just 2 revisions- 1 with it and 1 without? For a manual, non quattro model am I right in thinking the average consumptions are 44 and 42 respectively? With regards to the sat nav, did the 40GB HDD come as part of the same unit, or was it a seperate accessory in itself? I've seen a few HDD retro fit kits on ebay, but is it a DIY job? I appreciate its not going to be as straightforward as fitting an RNS-E, but is it easy enough to do or not? Ill probably think of other questions later, but can add them as they come to me!