Page 294 of 376
294 Practical hintsLocking/unlocking in an emergencyKEYLESS-GO card*
1Battery cover
Replacement batteries: Lithium, type
CR 2025 or equivalent.
Pry open the cover 1.
Remove the batteries.
Install new batteries as indicated by
the “+” and “-” markings in the KEY-
LESS-GO card.
Replace battery cover 1.
Page 305 of 376
305 Practical hints
Flat tire
Drive the vehicle back and forth very
slowly approximately 30 ft (10 m).
This distributes the TIREFIT sealant ma-
terial inside the tire.
Take the electric air pump out of the
trunk.
1Flap
2Air hose with pressure gauge and vent
screw
3Union nut
4Electrical plug
Open flap 1 on air pump.
Pull out electrical plug 4 and air hose
with the pressure gauge 2.
Screw the air hose 2 onto the tire valve.
Insert electrical plug 4 into vehicle ci-
gar lighter socket.
Turn the key in the ignition to position
1 (
page 29).
or
Press the KEYLESS-GO* start/stop
button on the selector lever once. Do
not depress brake pedal.
Press I on the electric air pump switch.
The electric air pump should now
switch on and inflate the tire.
After 5 minutes, the pressure gauge must
display at least 26 psi (1.8 bar). The air
hose and the union nut can become hot
during inflation. Please exercise appropri-
ate caution.
If this tire pressure is not attained, turn
off the electric air pump, detach the air
hose from the tire valve, and again
drive vehicle back and forth very slowly
approximately 30 ft (10 m).
This serves to better distribute the
TIREFIT sealant material inside the tire.
Inflate the tire again.
Warning!
G
Observe safety instructions on air pump la-
bel.
Page 306 of 376
306 Practical hintsFlat tire
Press 0 on the electric air pump switch.
Turn the key in the ignition to
position0.
or
Press KEYLESS-GO* start/stop button
on the selector lever twice. Do not de-
press brake pedal.
The electric air pump should now be
switched off.
Detach the electric air pump.
The air hose may still be hot. Please ex-
ercise appropriate caution.
Store the electrical plug and the air
hose behind the flap and place the air
pump back in the trunk.
Close the trunk lid.
Drive away immediately.
The TIREFIT sealant will distribute itself
evenly inside the tire.
After driving vehicle for an initial
10 minutes, check tire pressure using
the pressure gauge on the air pump.
!Do not operate the electric air pump
longer than eight minutes without in-
terruption. Otherwise it may overheat.
You may operate the air pump again af-
ter it has cooled off.
Warning!
G
If a tire pressure of 26 psi (1.8 bar) is not at-
tained, tire is too severely damaged for
TIREFIT to provide a reliable tire repair.
In this case, TIREFIT cannot properly seal
the tire.
Do not drive the vehicle.
Contact the nearest Mercedes-Benz Center
or call Roadside Assistance.
Warning!
G
Do not exceed vehicle speed of
50 mph (80 km / h). A TIREFIT repair is not
designed to operate at higher speeds.
The sticker must be attached on the instru-
ment cluster where it will be easily seen by
the driver.
Vehicle handling characteristics may
change. Adapt your driving accordingly.
Page 309 of 376
309 Practical hints
Flat tire
1TIREFIT container
2Flap
3Notch
4Electrical plug
5Air hose
6Flange
Open flap2 on the electric air pump.
Pull plug4 and air hose5 out of the
pump housing.
Screw the air pump’s air hose5 onto
flange6 of the TIREFIT container.
Stick TIREFIT container1 upside down
into notch3 of the electric air pump.
7Tire valve
8Electric air pump switch
9Air hose with pressure gauge and vent
screw
10Filler hose
Unscrew the valve cap from tire
valve7.
Screw filler hose10 onto tire valve7.
Insert electrical plug4 into vehicle cig-
arette lighter socket.
Turn the key in the ignition to
position1 (
page 29).
or
Press the KEYLESS-GO* start/stop
button (
page 30) on the selector le-
ver once. Do not depress brake pedal.
PressI on electric air pump switch8.
The electric air pump should now
switch on and inflate the tire.
iIf sealant has leaked out, let it dry. You
can then peel it off.
Warning!
G
Observe safety instructions on air pump la-
bel.
!Do not operate the electric air pump
longer than eight minutes without in-
terruption. Otherwise it may overheat.
You may operate the air pump again af-
ter it has cooled off.
Page 310 of 376
310 Practical hintsFlat tireAfter 5 minutes, the pressure gauge must
display at least 26 psi (1.8 bar). The air
hose can become hot during inflation.
Please exercise appropriate caution.
If this tire pressure is not attained, turn
off the electric air pump, detach the fill-
er hose from the tire valve, and drive
vehicle back and forth very slowly ap-
proximately 30 ft (10 m).
This serves to better distribute the
TIREFIT sealant material inside the tire.
Unscrew the air pump’s air hose5 from
flange6 of the TIREFIT container.
Inflate the tire again.
After attaining a tire pressure of 26 psi
(1.8 bar), press0 on electric air pump
switch8.
The electric air pump should now be
switched off.
Turn the key in the ignition to
position0 (
page 29).
or
Press the KEYLESS-GO* start/stop
button (
page 30) on the selector le-
ver once. Do not depress brake pedal.
Detach the electric air pump.
The air hose may still be hot. Please ex-
ercise appropriate caution.
Store the electrical plug and the air
hose behind the flap and place the air
pump back in the trunk.
Close the trunk lid.
Drive away immediately.
The TIREFIT sealant will distribute itself
evenly inside the tire.
Warning!
G
If a tire pressure of 26 psi (1.8 bar) is not at-
tained, tire is too severely damaged for
TIREFIT to provide a reliable tire repair.
In this case, TIREFIT cannot properly seal
the tire.
Do not drive the vehicle.
Contact the nearest Mercedes-Benz Center
or call Roadside Assistance.
Warning!
G
Do not exceed vehicle speed of
50 mph (80 km / h). A TIREFIT repair is not
designed to operate at higher speeds.
The sticker must be attached on the instru-
ment cluster where it will be easily seen by
the driver.
Vehicle handling characteristics may
change. Adapt your driving accordingly.
Page 316 of 376
316 Practical hintsFlat tireInflating the spare tire
Take the electric air pump out of the
trunk (
page 289).
1Flap
2Air hose with pressure gauge and vent
screw
3Union nut
4Electrical plug
Open flap 1 on air pump.
Pull out the electrical plug 4 and air
hose with the pressure gauge 2.
Remove the valve cap from the tire
valve.
Screw the air hose 2 onto the tire valve.
Insert electrical plug 4 into vehicle ci-
gar lighter socket.
Turn the key in the ignition to
position1.
or
Press the KEYLESS-GO* start/stop
button on the selector lever once with-
out depressing the brake pedal.
Press 1 on the electric air pump switch.
The electric air pump should now
switch on and inflate the tire.
Inflate the tire to approx. 36 psi
(2.5 bar).
This takes about five minutes for the
spare tire. The air hose 2 and the union
nut 3 can become hot duration infla-
tion. Exercise proper caution to avoid
burning yourself when using the equip-
ment.
!Do not lower the vehicle before inflat-
ing the spare wheel tire. Otherwise the
rim may be damaged.Warning!
G
Observe instructions on air pump label.
Page 317 of 376
317 Practical hints
Flat tire
Press 0 on the electric air pump switch.
Turn the key in the ignition to
position0.
or
Press KEYLESS-GO* start/stop button
on the selector lever twice without de-
pressing the brake pedal.
The electric air pump should now be
switched off.
If the tire pressure is above 36 psi
(2.5 bar), release excess tire pressure
using the vent screw.
Detach the electric air pump.
Stow the electrical plug and the air
hose behind the flap and place the air
pump back in the trunk.
!Do not operate the air pump longer
than eight minutes without interrup-
tion. Otherwise it may overheat.
You may operate the air pump again af-
ter it has cooled off.
Warning!
G
Follow recommend inflation pressures.
Do not overinflate tires. Overinflating tires
can result in sudden deflation (blowout) be-
cause they are more likely to become punc-
tured or damaged by road debris, potholes
etc.
Do not underinflate tires. Underinflated tires
wear unevenly, adversely affect handling
and fuel economy, and are more likely to fail
from being overheated.
iThe flat tire may be transported in the
trunk when the retractable hardtop is
lowered. Use the protective sheet pro-
vided with the spare wheel. Do not ac-
tivate the tire inflation pressure
monitor until the deflated tire has been
removed from the vehicle.
Page 320 of 376
320 Practical hintsBatteries
Disconnecting the batteriesDisconnecting the battery for electrical
consumers
Unhook the luggage cover in the trunk.
Remove the trunk floor.
The battery for electrical consumers is
located in the right hand area of the
trunk (
page 289).
Use the 10 mm open-end wrench from
the vehicle tool kit to disconnect the
battery negative lead.
Remove the cover from the positive ter-
minal.
Disconnect the battery positive lead.
Disconnecting the starter battery
Use the 10 mm open-end wrench from
the vehicle tool kit to disconnect the
battery negative lead.
Remove the cover from the positive ter-
minal.
Disconnect the battery positive lead.
Warning!
G
The brake system requires electrical power
to operate.
A malfunction in the vehicle’s power supply
or electrical system may impair brake sys-
tem operation and switch it into its
limp-home (emergency operation) mode.
The same applies if battery is disconnected.
To brake, the driver must then apply signifi-
cantly greater brake pedal pressure and de-
press the pedal much further to obtain the
expected braking effect. If necessary, apply
full pressure to the brake pedal. Brakes are
only applied to the front wheels. Stopping
distance is increased! Adjust your driving
style accordingly. SBC brake system
(page 72).
Warning!
G
With a disconnected battery
y o u w i l l n o l o n g e r b e a b l e t o t u r n t h e k e y
in the starter switch and pressing the
KEYLESS-GO
* start/stop button (if so
equipped) on the selector lever will have
no effect
the selector lever will remain locked in
positionP!To avoid damage to electrical compo-
nents, always disconnect the battery
for electrical consumers (in trunk) first.
This applies even if you only wish to
charge the starter battery. Otherwise
the electronics of the vehicle can be
damaged.
