Page 297 of 491

296 OperationAt the gas stationRefueling
The fuel filler flap is located on the
right-hand side of the vehicle towards the
rear. Locking / unlocking the vehicle with
the remote control automatically
locks / unlocks the fuel filler flap.
Turn the engine off
by turning the SmartKey to
position0.
by pressing the KEYLESS-GO*
start/stop button. Open the driv-
er’s door (with the driver’s door
open, starter switch is now in
position0, same as SmartKey re-
moved from starter switch).
Remove the SmartKey from the starter
switch.
Open the fuel filler flap by pushing at
the point indicated by the arrow.
The fuel filler flap springs open.
Turn the fuel cap to the left and hold on
to it until possible pressure is released.
Take off the cap and set it in the recess
on the fuel filler flap.
To prevent fuel vapors from escaping
into open air, fully insert filler nozzle
unit.
Only fill your tank until the filler nozzle
unit cuts out – do not top up or over-
fill.
Warning!
G
Gasoline is highly flammable and poisonous.
It burns violently and can cause serious
injury. Whenever you are around gasoline,
avoid inhaling fumes and skin contact, extin-
guish all smoking materials. Never allow
sparks, flame or smoking materials near
gasoline!
Warning!
G
Overfilling of the fuel tank may create pres-
sure in the system which could cause a gas
discharge. This could cause the gas to spray
back out when removing the fuel pump noz-
zle, which could cause personal injury.
Page 298 of 491
297 Operation
At the gas station
Replace the fuel cap by turning it to the
right.
You will hear when the fuel cap is tight-
ened.
Close the fuel filler flap.
Check regularly and before a long trip
1Windshield washer and headlamp
cleaning system*
2Brake fluid
3Coolant level
iLeaving the engine running and the fuel
cap open can cause the yellow fuel
tank reserve warning lamp to flash and
the? malfunction indicator lamp
(USA only) or the ± malfunction in-
dicator lamp (Canada only) to illumi-
nate.
For more information, see “Practical
hints” (
page 357).
iOnly use premium unleaded gasoline
with a minimum Posted Octane Rating
of 91 (average of 96 RON / 86 MON).
Information on gasoline quality can
normally be found on the fuel pump.
More information on gasoline can be
found in the Factory Approved Service
Products pamphlet.
iOpening the hood, see (
page 299).
Page 473 of 491

472 IndexEngine oil
Adding 302
Checking level 300
Consumption 300
Display messages 382
Messages in display 301
Viscosity 460
ESP 89, 460
Four wheel electronic traction system
with ESP 95
Switching off 91
Switching on 92
Synchronizing 367
Warning lamp 353
ETD 460
Safety guidelines 66
Exterior lamp switch 141
Exterior rear view mirrors
Adjusting 42
Parking position for 176
F
Fahrenheit
Setting temperature units 165
Fastening the seat belts 44
Fine adjustment
Cruise control 231First aid kit 401
Flat tire 418
Mounting the spare wheel 419
Spare wheel 419
Flexible Service System (FSS) 461
Floormats 268
Fog lamp, rear 145
Fog lamps
Switching on 144
Fog lamps, front
Messages in display 386
Switching on 144
Folding back folding bench seat 136
Folding bench seat in cargo
compartment 134
Folding head restraints back 127
Following distance in Distronic* 239
Four wheel electronic traction system
(4MATIC) with ESP 95
4MATIC 95
4-zone automatic climate control* 208
Front airbags 67
Front doors
Opening from inside vehicle 115
Front fog lamp
Replacing bulb 411Front interior lighting 148
Front lamps 411
Messages in display 387
Replacing bulbs 413
Switching on 141
Front reading lamps
Switching on/off 148
Front seat head restraints
Power seat 126
Removing and installing 126
Front seats
Heater* 132
FSS (Flexible Service System) 461
Fuel 297
Fuel tank reserve warning lamp 357
Premium unleaded gasoline 297
Fuel consumption statistics
After start 178
Since last reset 178
Fuel filler flap 296
Locking 296
Unlocking 296
Fuel reserve tank
Message in display 385
Fuel tank
Filler flap 296