Page 322 of 514

321 Operation
At the gas station
At the gas station
Refueling
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 off or over-
fill.
Warning!
G
Gasoline is highly flammable and poisonous. 
It burns violently and can cause serious 
injury.
Never allow sparks, flame or smoking mate-
rials near gasoline!
Turn off the engine before refueling.
Whenever you are around gasoline, avoid in-
haling fumes and skin or clothing contact, 
extinguish all smoking materials.
Direct skin contact with fuels and the inha-
lation of fuel vapors can damage your 
health.
i
In case that the central locking system does 
not release the fuel filler flap, or the opening 
mechanism is clamping, notify Roadside Assis-
tance or an authorized Mercedes-Benz Center.
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 323 of 514

322 OperationAt the gas station
Replace fuel cap by turning it clockwise 
until it audibly engages.
Close the fuel filler flap.
Check regularly and before a long trip
1Windshield washer system and head-
lamp cleaning system*
2Brake fluid 
3Coolant levelWindshield washer system and 
headlamp cleaning system*
For information on refilling the reservoir, 
see “Windshield washer system and head-
lamp cleaning system*” (
page 331).
Brake fluid
For information on brake fluid, see “Fuels, 
coolants, lubricants, etc.” (page 489).
i
Leaving the engine running and the fuel cap 
open can cause the yellow fuel tank reserve 
warning lamp to flash and the malfunction indi-
cator lamp? (USA only) or the malfunction 
indicator lamp± (Canada only) to illuminate.
For more information, see also “Practical hints” 
(
page 382). 
i
Only 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.
For more information on gasoline, see the 
Factory Approved Service Products pamphlet 
(USA only) or contact an authorized 
Mercedes-Benz Center. 
i
Opening the hood, see (
page 324).
!
If you find that the brake fluid in the brake 
fluid reservoir has fallen to the minimum mark or 
below, have the brake system checked for brake 
pad thickness and leaks immediately. Notify an 
authorized Mercedes-Benz Center immediately. 
Do not add brake fluid as this will not solve the 
problem. For more information, see “Practical 
hints” (page 381).
 
     
        
        Page 502 of 514

501 Index
Fluids
Automatic transmission fluid 486
Brake fluid 487
Capacities 486
Engine coolant 487
Engine oil 486
Power steering fluid 487
Windshield washer and headlamp 
cleaning system 488
Fog lamps 144
Messages in display 420, 421, 422, 
423
Replacing bulbs 444
Folding bench seat
Folding back 136
Folding bench seat in cargo 
compartment 134
Four wheel electronic traction system with 
ESP
® see 4MATIC
4MATIC 104
Front air bags 74
Front lamps see Headlamps
Front passenger front air bag
Messages in display 391
Front passenger front air bag off indicator 
lamp 74, 79Front seat head restraints see Head re-
straints
FSS (Canada vehicles) 365
Fuel 309, 322
Additives 491
Capacities, Fuel tank 488
Filling the tank 321
Fuel filler flap and cap 321
Fuel reserve warning lamp 385
Premium unleaded gasoline 322
Requirements
Gasoline additives 491
Premium unleaded gasoline 490
Requirements, Octane rating (Gasoline 
engine) 490
Technical data 486
Fuel consumption statistics
Since last reset 183
Since start 183
Fuel filler flap 321
Locking/unlocking 321
Opening 321
Fuel reserve warning lamp 27
Fuel tank
Capacity 488
Filler flap 321Fuel, Premium unleaded gasoline 322, 
488, 490
Fuels, coolants, lubricants etc.
Capacities 486
Fuses 471
Aids for replacing fuses 471
Fuse box in cargo compartment 472
Fuse box in passenger 
compartment 472
Fuse chart 471
Fuse extractor 471
Replacing 471
Spare fuses 471
G
Garage door opener 31, 300
Gasoline see Fuel
GAWR 359
Gear range
Automatic transmission 192
Limiting 192
Shifting into optimal 195, 196