BMW Genuine OEM Wheel Center Cap Wrench Key E39 E38 Wheel Style 4 5 6 15 This wrench is used to install or remove all wheel center cap with wheel style 4, 5, 6, 15. It fits E39 Wheel style 5 with 16" style (This will not fit 17" wheels) E38 wheel style 4, 5, 6, 15