Convenient opening/locking:
By default "Locking (remote control) will be unchecked. Checking this option will enable you to roll your windows/sunroof up with the key fob.
Central locking functions:
"Mechanical lock" indicates the physical door keyhole and "Remote control, key 1-4" correspond to available key fobs. Selecting "No" will unlock all doors at once. "Selective" will unlock the drivers door first, and all other doors with a subsequent unlock command. "Entr. aid" will roll down the drivers window when unlocking the doors, a feature I don't quite understand.
Automatic locking:
From here you can choose whether you want automatic locking all the time, or just with certain keys. "After starting (lock) will make automatic locking the default regardless of keys. "Terminal R" indicates reverse, and will lock the doors upon reversing, where all other options will lock the doors at a certain speed.