Notes: * Synthetic glep 1, for lubricating O- rings-100 G tube. Do not use on plastic parts. It may cause them to break. Warning: assembly and disassembly are only possible with the special tool and in accordance with the specification of the original BMW part and accessories installation instructions. Incorrect assembly and disassembly may give rise to damage, E.G., due to an incorrect wheel connection. There is a risk of accident or risk of material damage. Assembly and disassembly of the wheels may only be carried out by an authorized service center or another qualified service center or a repair shop in accordance with the original BMW part and accessories installation instructions. Observe the notice in the installation instructions . --- The following special tools are required: 83 30 5 A89 462 (socket) 83 30 5 A5C 2D3 (torque wrench 1000 nm) 83 30 5 A6F E33 (loosening tool) --- note: for mainland china: retrofitting not following ga-801 2019 is only allowed for use on racetrack and not for use on public roads according to the relevant retrofitting regulation.