Lost locking wheel nut key and flat battery

[Olliebeak]

I changed the front wheels on my BMW E85 Z4 2.5 and must have drove off with the locking wheel nut key still on the wheel nut, it obviously flew off and cannot be found. Anyone know where I can get a replacement or how to get the nuts off. I bought a splined locking key set but none of the sockets fit my car.
Also the car is stored in a lock up and this morning the battery was flat. If I take it off to charge (no power in the lock up) will I lose any electronic settings or radio code etc.
thanks

 

[NZ00Z3]

If they are the BMW lock bolts, then you're off to the BMW dealer to get another one. Not very expensive.

When I had this problem, I fronted up to the BMW dealer with another 4 normal lug bolts in hand. They removed the lock bolts and fitted my normal ones for free.

 

[andyglym]

Any tyre garage will be able to get your locking nuts off mate, a local one did ours on the Yeti when like you, we lost it. No charge and 2 mins. Just replaced x 4 bolts with a new bolt key.