See also:

Tow mode switch
TOW MODE should be used when pulling a heavy trailer or hauling a heavy load. Driving the vehicle in TOW MODE with no trailer/load or light trailer/light load will not cause any damage. Howe ...

Braking precautions
The brake system has two separate hydraulic circuits. If one circuit malfunctions, you will still have braking at two wheels. ...

Ride & Handling
Midsize luxury cars run the gamut from comfortable to rigid; the M is closer to rigid, though not so much that it's punishing to drive. My test car last year had the Sport package — which augments ...