3rd gear is different to 4th, 5th and 6th because it allows slip below certain speeds. i.e. if you are going quite slow and change to 3rd, but then lift off the throttle, the revs drop to idle but you stay in gear. If you then floor it, the revs will shoot right up like a slipping clutch until the car's speed catches up, and then the box will lock. 4th, 5th and 6th are always locked up.
So, the revs that you can see in 3rd will range from idle to the red line!
Black 330d E90 LCI M Sport Saloon Auto. Privacy Glass, Cream Leather, 6FL, I-Drive/Nav/Bluetooth, Alpine hifi upgrade.