Opening

Remove the SmartKey from the Switch off the engine.
ignition lock. Remove the SmartKey from the ignition lock.
KEYLESS-GO: open the driver’s door. This switches the ignition to position 0, which corresponds to having removed the SmartKey. The driver’s door can be closed again.
direction of arrow 1. Press the fuel filler flap in the direction of arrow 1.
The fuel filler flap opens slightly.
Turn the fuel filler cap Open the fuel filler flap.
counter-clockwise and remove it. Turn the fuel filler cap counter-clockwise and remove it.
holder bracket on the inside of filler flap 2. Insert the fuel filler cap into the holder bracket on the inside of filler flap 2.
into the filler neck and refuel. Completely insert the pump nozzle into the filler neck and refuel.
nozzle switches off. Only fill the tank until the pump nozzle switches off.

damage the Overfilling the fuel tank could damage the fuel system.

    See also:

    Overview
    Brimming with genuine character, the new Mercedes-Benz GLK-Class is set to take the world of compact SUVs by storm. Yet it is not just the distinctive all-rounder's practical and appealingly compa ...

    Parking the vehicle for a long period
    If you leave the vehicle parked for longer than four weeks, the battery may be damaged by exhaustive discharge. Connect a trickle charger. You can obtain information about trickle chargers ...

    Problems with the engine
    ...