1999 BMW 740 Key won't turn in ignition, neither can gear s

I have seen this before, there is a interlock cable between the ignition lock housing and the shifter assembly. It has either backed out of the ignition lock housing and needs to be tightened or the cable might be broken or the ignition lock assembly is somehow not actuating that cable. It(the cable) is present to prevent gear selection with the key removed. Removal of the surround at the shifter console allows access to the interlock and it can be defeated temporarily with a small screwdriver, just lift the "hook" and select the gear.