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I don't seem to have a lock nut key in my toolkit.
Does anyone know the spec of the splines to that I can get a new one?
PS: This is legit, I own the car.
Are you talking about the "Flower" Lug bolts or the "puzzle lock"? The "Flower" lug bolts can be removed with a regular 17mm socket but even better buy one of these ;
If you are looking for the puzzle lock key contact Mercedes or previous owner. If that doesn't get you the one you need google how to remove the lock and replace them.
I can second this, we just picked up a '13 GL63 and that Amazon tool linked above is correct, I had to order one too. If it's the single locking lug different from the other 4 on each wheel though you'd need the Mercedes kit. They come in a small plastic box, maybe 4" x 3", and can sometimes fall down on the side of the spare tire etc if that is where it was kept.
I can't seem to find one with a nut on the end so the tyre brace can connect to it.
I'll look for a hex to 1/2" socket drive adapter. I'm sure that exists.
Based on the picture the bolts are a bit out of shape from using a regular 17mm socket instead of the "Flower" 17mm socket. Probably removed with an impact gun. You may find that the "Flower" socket will not work on all the lug bolts due to the distortion of the bolts but a regular17mm will still work. "Flower" lug bolts only retain their shape if the proper socket has always been used. Try the regular 17mm and unless you want to replace all the lug bolts I would recommend to skip the "Flower" socket and just use the regular 17mm one.
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