Swedish auto magazine Teknikens Värld which recently published an article on the M3 been fueled up with E85 Ethanol has just posted a follow up.
The original set of pictures were taken by one of their readers. Another reader has now reported also having been present.
This reader however claims to have sticked around for log enough to see the test driver make a few adjustments with a laptop in the passenger seat, take the car for a short drive after which he adjusted some more settings. He also reports that the test driver then waited for another masked car (a Mini) and they took off in high speed.
The speculation now is whether BMW is testing some kind of Multi-fuel engine setup. This might not necessarily be intended for the M3, but who knows
See the whole article at Teknikens Värld