See also:

Misfuel prevention (diesel)
Mechanical device which prevents filling the tank of a Diesel vehicle with petrol. It avoids the risk of engine damage that can result from filling with the wrong fuel. Located in the filler neck ...

Horn
Audible warning system to alert other road users to an imminent danger. Press the central part of the multifunction steering wheel. Use the horn moderately and only in the following circumstances: ...

Instruments and controls
1. Audio and telematic system steering mounted controls. 2. Steering lock and ignition. 3. Wiper / screenwash / trip computer control stalk. 4. Instrument panel. 5. Driver's airbag. Horn. ...