Mercedes-Benz 2013 GLS Class - Manual (Page 180)

X CLS Shooting Brake: open the tailgate.
X Open the right-hand side trim panel.
X Fold down the trim.
X Detach the emergency release from
retainer :.
X Pull the emergency release in the direction
of arrow ;.
The fuel filler flap is released.
X Open the fuel filler flap.
178
Refuelling
Driving and parking