Sometimes the turn out option is broken (driver only?). It looks like this bug only appears when other players are in the vehicle too. There seems to be a dependency between the turn out/in status from gunner, commander and driver. Not really sure how they relate to each other. I haven't tried other vehicles with turn in/out option, they might have the same problem.
Sometimes the commander can't zoom in anymore. This might be related to the turn in/out status mentioned in point 1.
Either the crew or the turret is placed/moddeled incorrectly because you can see the crew between the turret and the hull of the AMV-7 Marshall (see screenshots).
edit (05.12.2014):
- changed desription
- added bug 1 and 2.