Shift knob/selector lever handle see main group 25 For this retrofit there are no installation instructions. To be installed by skilled personnel only, best by a BMW partner. BMW is unable to accept any responsibility for operating failures and damages resulting from incorrect installation. Attention! If converting from wooden decor covers to aluminium Wellenschliff covers, the rear cover or storage compartment must be replaced on ITU 515114, whereas the top and bottom of the handle must be replaced on ITUs 515005 and 515044. Installation time approx. 4.0 hours, which may vary depending on the condition of the vehicle and the equipment in it. Only suitable for cars with MASK Only matches ground aluminum wave pattern,Shift knob/selector lever handle see main group 25 For this retrofit there are no installation instructions. To be installed by skilled personnel only, best by a BMW partner. BMW is unable to accept any responsibility for operating failures and damages resulting from incorrect installation. Attention! If converting from wooden decor covers to aluminium Wellenschliff covers, the rear cover or storage compartment must be replaced on ITU 515114, whereas the top and bottom of the handle must be replaced on ITUs 515005 and 515044. Installation time approx. 4.0 hours, which may vary depending on the condition of the vehicle and the equipment in it.