The M550d is available in both the saloon and touring chassis, with a ZF 8HP eight-speed sport automatic transmission including auto start/stop function. Manual and non-sport automatic gearboxes are not available. Unique features on the M550d are the twin trapezial exhausts in dark chrome and both wing mirrors and air-intake bars in ferric grey. Other 5 Series models have wing mirrors in the same colour as the rest of the vehicle. The front fog lamps, standard on all other F10/F11 5 Series models are removed, to make space for additional air-intakes. The door-sill plates are also unique on this vehicle, having a "M550d" inscription. In addition, the F11 Touring model features air suspension on the rear axle, with automatic self-levelling.