Page 340 of 435
339 Practical hints
What to do if …?
Tire pressure monitor messages
(vehicles produced as of approximately
October 2003)Display symbol
Display message
Possible cause
Possible solution
H
TIRE PRES.
CAUTION, TIRE
DEFECT!
One or more tires are deflating.
Carefully bring the vehicle to a halt, avoid-
ing abrubt steering and braking maneu-
vers. Observe the traffic situation around
you
Repair or change the wheel (
page 361).
TIRE PRES.
CHECK TIRES!
The pressure has fallen significantly in
one or more tires.
Carefully bring the vehicle to a halt, avoid-
ing abrubt steering and braking maneu-
vers. Observe the traffic situation around
you.
Repair or change the wheel (
page 361).
TIRE PRES.
PLEASE CORRECT!
The pressure is too low in one or more
tires.
Check and correct tire pressure as re-
quired (
page 283).
Warning!
G
Do not drive with a flat tire. A flat tire affects
the ability to steer or brake the vehicle.
You may lose control of the vehicle. Contin-
ued driving with a flat tire will cause exces-
sive heat build-up and possibly a fire.
Page 341 of 435
340 Practical hintsWhat to do if …?Display symbol
Display message
Possible cause
Possible solution
H
TIRE PRES., LF
CAUTION, TIRE
DEFECT!
The left front tire is deflating.
Bring the vehicle to a halt, avoiding
abrubt braking maneuvers. Observe the
traffic situation around you.
Repair or change the wheel (
page 361).
TIRE PRES., LF
CHECK TIRES!
The left front tire pressure is low.
Bring the vehicle to a halt. Observe the
traffic situation around you.
Check the tire.
Check and correct tire pressure as re-
quired.
TIRE PRES., RF
CAUTION, TIRE
DEFECT!
The right front tire is deflating.
Bring the vehicle to a halt, avoiding
abrubt braking maneuvers. Observe the
traffic situation around you.
Repair or change the wheel (
page 361).
Warning!
G
Do not drive with a flat tire. A flat tire affects
the ability to steer or brake the vehicle.
You may lose control of the vehicle. Contin-
ued driving with a flat tire will cause exces-
sive heat build-up and possibly a fire.
Page 342 of 435
341 Practical hints
What to do if …?
Display symbol
Display message
Possible cause
Possible solution
H
TIRE PRES., RF
CHECK TIRES!
The right front tire pressure is low.
Bring the vehicle to a halt. Observe the
traffic situation around you.
Check the tire.
Check and correct tire pressure as re-
quired.
TIRE PRES., LR
CAUTION, TIRE
DEFECT!
The left rear tire is deflating.
Bring the vehicle to a halt, avoiding
abrubt braking maneuvers. Observe the
traffic situation around you.
Repair or change the wheel (
page 361).
TIRE PRES., LR
CHECK TIRES!
The left rear tire pressure is low.
Bring the vehicle to a halt. Observe the
traffic situation around you.
Check the tire.
Check and correct tire pressure as re-
quired.
Warning!
G
Do not drive with a flat tire. A flat tire affects
the ability to steer or brake the vehicle.
You may lose control of the vehicle. Contin-
ued driving with a flat tire will cause exces-
sive heat build-up and possibly a fire.
Page 343 of 435
342 Practical hintsWhat to do if …?Display symbol
Display message
Possible cause
Possible solution
H
TIRE PRES., RR
CAUTION, TIRE
DEFECT!
The right rear tire is deflating.
Bring the vehicle to a halt, avoiding
abrubt braking maneuvers. Observe the
traffic situation around you.
Repair or change the wheel (
page 361).
TIRE PRES., RR
CHECK TIRES!
The right rear tire pressure is low.
Bring the vehicle to a halt. Observe the
traffic situation around you.
Check the tire.
Check and correct tire pressure as re-
quired.
TIRE PRES. MONITOR
REACTIVE AFTER
CORRECTING PRESSURE!
There was a tire pressure warning mes-
sage.
The yellow warning lamp for the tire pres-
sure monitor comes on and you have not
reactivated the system since the last tire
pressure check.
Activate the tire pressure monitor after
correcting the tire pressure values
(page 283).
Warning!
G
Do not drive with a flat tire. A flat tire affects
the ability to steer or brake the vehicle.
You may lose control of the vehicle. Contin-
ued driving with a flat tire will cause exces-
sive heat build-up and possibly a fire.
Page 344 of 435
343 Practical hints
What to do if …?
Display symbol
Display message
Possible cause
Possible solution
H
TIRE PRES. MONITOR
REACTIVATED
The tire pressure monitor is using the cur-
rent pressure values as the basis for mon-
itoring.
TIRE PRES. MONITOR
CURRENTLY
UNAVAILABLE
The tire inflation pressure monitor* is un-
able to monitor the tire pressure due to:
the presence of several wheen sen-
sors in the vehicle
excessive wheel sensor temperatures
a nearby radio interference source
unrecognized wheel sensors installed
Remove any extra wheel sensors from the
vehicle
As soon as the causes of the malfunction
have been removed, the tire pressure moni-
tor automatically becomes active again.
TIRE PRES. MONITOR
NOT OPERATIONAL
DRIVE TO WORKSHOP
The tire pressure monitor or a wheel sen-
sor is malfunctioning.
Have the tire inflation pressure monitor
checked by an authorized Mercedes-Benz
Center.
A wheel without proper sensor was in-
stalled.
Have the wheels checked.
Warning!
G
Do not drive with a flat tire. A flat tire affects
the ability to steer or brake the vehicle.
You may lose control of the vehicle. Contin-
ued driving with a flat tire will cause exces-
sive heat build-up and possibly a fire.
Page 347 of 435
346 Practical hintsWhere will I find ...?
Spare wheel
Removing the spare wheel
Take out the vehicle tool kit tray2.
Loosen the luggage bowl3. To do so,
turn the luggage bowl counterclock-
wise
Remove the spare wheel4.
Storing the spare wheel
Place spare wheel4in wheel well.
Secure the spare wheel. To do so, turn
the luggage bowl3 clockwise to its
stop.
Place vehicle tool kit tray2 in luggage
bowl.Spare wheel S 430, S 500 and S 600
(except Sport Package*)
The spare wheel rim is mounted with a full
sized tire of the same type as on the vehi-
cle, and it is fully functional.
However, that spare wheel rim is weight
optimized and has a limited service life of
12 000 miles (20 000 km) use before a
standard wheel rim must replace it.
In case of flat tire, you may temporarily use
the spare wheel.
Do not operate vehicle with more than one
spare wheel mounted.
Warning!
G
The jack is designed exclusively for jacking
up the vehicle at the jack take-up brackets
built into both sides of the vehicle. To help
avoid personal injury, use the jack only to lift
the vehicle during a wheel change. Never
get beneath the vehicle while it is supported
by the jack. Keep hands and feet away from
the area under the lifted vehicle. Always
firmly set parking brake and block wheels
before raising vehicle with jack.
Do not disengage parking brake while the
vehicle is raised. Be certain that the jack is
always vertical (plumb line) when in use, es-
pecially on hills. Always try to use the jack
on level surface. Make sure the jack arm is
fully seated in the jack take-up bracket. Al-
ways lower the vehicle onto sufficient ca-
pacity jackstands before working under the
vehicle.
Page 348 of 435
347 Practical hints
Where will I find ...?
For more information, see “Rims and tires”
(page 384).Spare wheel S 55 AMG and Sport
Package*
In case of a flat tire, you may temporarily
use the spare wheel when observing the
following restrictions:
Do not exceed a vehicle speed of
50 mph (80 km/h).
Drive to the nearest tire repair facility
to have the flat tire repaired or re-
placed as appropriate.
Do not operate vehicle with more than
one spare wheel mounted.
For more information, see “Rims and tires”
(
page 384).
Warning!
G
Never operate the vehicle with more than
one spare wheel mounted.
The spare wheel rim is for temporary use
only. Use for over a total of 12 000 miles
(20 000 km) (aggregate of all uses) may
cause wheel rim failure leading to an acci-
dent and possible injuries.
The spare wheel should only be used tempo-
rarily and replaced with a regular road wheel
as quickly as possible.
Warning!
G
The dimensions of the spare wheel are dif-
ferent from those of the road wheels. As a
result, the vehicle handling characteristics
change when driving with a mounted spare
wheel. Adapt your driving style accordingly.
Never operate the vehicle with more than
one spare wheel mounted.
The spare wheel is for temporary use only.
When driving with spare wheel mounted, en-
sure proper tire pressure and do not exceed
vehicle speed of 50 mph (80 km).
The spare wheel rim is for temporary use
only. Use for over a total of 12 000 miles
(20 000 km) (aggregate of all uses) may
cause wheel rim failure leading to an acci-
dent and possible injuries.
The spare wheel should only be used tempo-
rarily and replaced with a regular road wheel
as quickly as possible.
Page 350 of 435
349 Practical hints
Unlocking/locking in an emergency
Unlocking the trunk
A minimum height clearance of 6 ft.
(1.85 m) is required to open the trunk lid.
If you are unable to unlock the trunk with
the SmartKey or KEYLESS-GO*, open the
trunk with the mechanical key.
The trunk lid lock is located above the rear
license plate recess.
1Unlocking and opening
Insert the mechanical key into the
trunk lid lock.
Turn the mechanical key counterclock-
wise to position1.
The trunk unlocks and opens.
Locking the vehicle
If you are unable to lock the vehicle with
the SmartKey or the SmartKey with
KEYLESS-GO*, lock it with the mechanical
key as follows:
Close the passenger doors and the
trunk lid.
Press the central locking switch in the
center console (
page 107).
Check to see whether the locking knob
on the passenger door is still visible. If
necessary push it down manually.
Slide mechanical key2 out of the
SmartKey (
page 348).
Lock the driver’s door with the me-
chanical key (
page 348).
Lock the trunk lid if necessary with the
mechanical key (if applicable)
(page 105).
Replacing batteries in the SmartKey/
SmartKey with KEYLESS-GO*
If the batteries in the SmartKey or the
SmartKey with KEYLESS-GO* are dis-
charged, the vehicle can no longer be
locked or unlocked. It is recommended to
have the batteries replaced at an autho-
rized Mercedes-Benz Center.
!The trunk lid swings open upwards au-
tomatically. Always make sure that
there is sufficient overhead clearance.
Warning!
G
Keep the batteries out of reach of children.
If a battery is swallowed, seek medical help
immediately.
