See also:

12 V accessory socket
To connect a 12 V accessory (maximum power: 120 Watts), lift the cover and connect a suitable adaptor. ...

Dimensions (in mm)
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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 ...