259 Operation
Tires and wheels
Checking tire inflation pressure
Regularly check your tire inflation pressure 
at least once a month.
Check and adjust the tire inflation 
pressure when the tires are cold. The tires 
can be considered cold if the vehicle has 
been parked for at least three hours or 
driven less than one mile (1.6 km).
If you check the tire inflation pressure 
when the tires are warm (the vehicle has 
been driven for several miles or sitting less 
than three hours), the reading will be 
approximately 4 psi (0.3 bar) higher than 
the cold reading. This is normal. Do not let 
air out to match the specified cold tire in-
flation pressure. Otherwise, the tire will be 
underinflated.
Follow the steps below to achieve correct 
tire inflation pressure:
Remove the cap from the valve on one 
tire.
Firmly press a tire gauge onto the 
valve.
Read tire inflation pressure on tire 
gauge and check against the recom-
mended tire inflation pressure on the 
placard on the driver’s door B-pillar 
(page 257). If necessary, add air to 
achieve the recommended tire inflation 
pressure.
Install the valve cap.
Repeat this procedure for each tire.iIf you have overfilled the tire, release 
tire inflation pressure by pushing the 
metal stem of the valve with e.g. a tip of 
a pen. Then recheck the tire inflation 
pressure with the tire gauge.iThe recommended tire inflation pres-
sures for your vehicle can be found on 
the tire placard located on the driver’s 
door B-pillar. The tire inflation pres-
sures are not listed in the Operator’s 
Manual.
Warning!
G
Follow recommended tire inflation 
pressures.
Do not underinflate tires. Underinflated tires 
wear excessively and / or unevenly, 
adversely affect handling and fuel economy, 
and are more likely to fail from being over-
heated.
Do not overinflate tires. Overinflated tires 
can adversely affect handling and ride 
comfort, wear unevenly, increase stopping 
distance, and result in sudden deflation 
(blowout) because they are more likely to 
become punctured or damaged by road 
debris, potholes etc.
Do not overload the tires by exceeding the 
specified load limit as indicated on the plac-
ard on the driver’s door B-pillar. Overloading 
the tires can overheat them, possibly caus-
ing a blowout. 
326 Practical hintsUnlocking/locking in an emergency
Press lock cylinder2 and pull on tail-
gate handle3.
Open the tailgate to the side.
Locking the vehicle
If you are unable to lock the vehicle with 
the SmartKey, lock it with the mechanical 
key as follows:
Close the passenger doors and the tail-
gate.
Press the central locking switch in the 
cockpit (
page 99).
Check to see whether the locking 
knobs on the passenger doors are still 
visible. If necessary, push them down 
manually.
Slide the mechanical key2 out of the 
SmartKey.
Lock the driver’s door with the me-
chanical key.
Check if the tailgate is locked. If neces-
sary lock the tailgate with the mechan-
ical key.
Fuel filler flap
The emergency release is in the cargo 
compartment behind the rear panel trim.
1Edge protection
2Rear panel trim
Open the tailgate. 
Remove edge protection1 from the 
door pillar. 
Remove rear panel trim2.
Warning!
G
The tailgate swings open to one side. Always 
make sure there is sufficient clearance for 
tailgate.iUnlocking your vehicle with the me-
chanical key will trigger the anti-theft 
alarm system. To cancel the alarm, do 
one of the following:
Press button Œ or ‹ on the 
SmartKey. 
Insert the SmartKey in the starter 
switch.