Page 292 of 473

291 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 and unlocking the vehicle with the 
SmartKey automatically locks and unlocks 
the fuel filler flap.1To open fuel filler flap
2To insert fuel filler cap
Remove the SmartKey from the starter 
switch.
Open fuel filler flap by pushing at point 
indicated by arrow1.
The fuel filler flap springs open.
Turn fuel filler cap counterclockwise 
and hold on to it until possible pressure 
is released.
Take off fuel filler cap and set it in 
direction of arrow2 in the recess on 
the inside of 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 
overfill. 
Replace the fuel filler cap by turning it 
clockwise until it audibly engages.
Warning!G
Gasoline is highly flammable and poisonous. 
It burns violently and can cause serious 
personal injury.
Never allow sparks, flame or smoking mate-
rials near gasoline!
Turn off the engine before refueling.
Whenever you are around gasoline, avoid 
inhaling fumes and skin contact, extinguish 
all smoking materials.
Direct skin contact with fuels and the 
inhalation of fuel vapors are damaging to 
your health.
iIn case that the central locking system does 
not release the fuel filler flap, or the opening 
mechanism is clamping, contact Roadside 
Assistance 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 293 of 473

292 Operation
At the gas station
Close the fuel filler flap.
Check regularly and before a long trip
Engine compartment 
(example illustration, SLK 350)
1Windshield washer system and head-
lamp cleaning system* reservoir
2Brake fluid reservoir
3Coolant expansion tankWindshield washer system and head-
lamp cleaning system*
For information on refilling the reservoir, 
see “Windshield washer system and 
headlamp cleaning system*” 
(
page 302).
Brake fluid
For information on brake fluid, see “Fuels, 
coolants, lubricants, etc.” (
page 443).
iMake sure to close the fuel filler flap before 
locking your vehicle as the flap locking pin 
prevents closing after you have locked the 
vehicle.
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. Please contact gas 
station personnel in case labels on the pump 
cannot be found.
For more information on gasoline, see “Premium 
unleaded gasoline” (
page 446), refer to the 
Factory Approved Service Products pamphlet 
(USA only), or contact an authorized 
Mercedes-Benz-Center.
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 indicator lamp (Canada only) 
to illuminate.
For more information, see “Practical hints” 
(
page 349).
iFor opening the hood, see “Hood” 
(
page 294).
!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 348).
 
     
        
        Page 458 of 473

457 Index
F
First aid kit 382
Flat tire 401
Inflating collapsible spare tire 411
Lifting vehicle 407
Lowering vehicle 413
Mounting spare wheel 407, 409
TIREFIT kit* 401
Floormat 257
Fog lamps 112, 394
Corner-illuminating front fog 
lamps* 114
Footwell lighting* 117
FSS PLUS (Canada vehicles) 334
Fuel
Additives 447
Consumption statistics (Control 
system) 148
Filler flap 291Fuel tank capacity 444
MON 292, 447
Premium unleaded gasoline 292, 
446
Refueling 291
Requirements 292, 447
Reserve warning lamp 353
RON 292, 447
Technical data 443
Fuel filler flap 291
Fuel gauge (Instrument cluster) 27
Fuse extractor (Vehicle tool kit) 382
Fuses 425
Fuse extractor 425
Replacing 425
Spare fuses 425
Spare fuses (Vehicle tool kit) 382G
Garage door opener* 270
Gasoline see Fuel
GAWR 328
Gear range
Automatic transmission 160
Limiting 160
Shifting into optimal 163, 165
Gear selector lever 155
Gearshift pattern 155
Position 156, 157
Shifting procedure 156
Gear selector lever one-touch gearshifting
Automatic transmission 162
Global locking/unlocking see SmartKey
Glove box 252
Good visibility 168
GPS 90, 91
Tele Aid system* 262
Gross Axle Weight Rating see GAWR
Gross Vehicle Weight Rating see GVWR
Gross Vehicle Weight see GVW
GSM network phones (Telephone*) 219
GVW 328
GVWR 328