Status display
The current status of the Tire Pressure Monitor
TPM can be displayed on the Control Display,
e.g., whether or not the TPM is active.
On the Control Display:
1. "Vehicle info"2."Vehicle status"3. "Tire Pressure Monitor (TPM)"
The status is displayed.
Status control display
Tire and system status are indicated by the
color of the tires and a text message on the
Control Display.
All wheels green
System is active and will issue a warning rela‐
tive to the tire inflation pressures stored during
the last reset.
One wheel is yellow
A flat tire or major drop in inflation pressure in
the indicated tire.
All wheels are yellow
A flat tire or major drop in inflation pressure in
several tires.
Wheels, gray
The system cannot detect a flat tire due to a
malfunction.
Status information
The status control display additionally shows
the current tire inflation pressures. It shows the
actual values read; they may vary depending
on driving style or weather conditions.
Carry out reset
Reset the system after each adjustment of the
tire inflation pressure and after every tire or
wheel change.
On the Control Display and on the vehicle:1. "Vehicle info"2."Vehicle status"3. "Perform reset"4.Start the engine - do not drive off.5.Reset the tire inflation pressure using
"Perform reset".
6.Drive away.
The tires are shown in gray and the status is
displayed.
After driving faster than 19 mph/30 km/h for a
short period, the set tire inflation pressures are
accepted as reference values. The resetting
process is completed automatically while driv‐
ing. After successful completion of the reset,
the tires appear in green on the Control Display
and "Tire Pressure Monitor (TPM) active" is dis‐
played.
The progress of the reset is displayed.
You may interrupt this trip at any time. When
you continue the reset resumes automatically.
Low tire pressure message
The yellow warning lamp lights up. A
Check Control message is displayed.
▷There is a flat tire or a major loss in
tire inflation pressure.
▷A reset of the system was not carried out
after a wheel was changed. The system
therefore issues a warning based on the tire
pressures before the last reset.
1.Reduce your speed and stop cautiously.
Avoid sudden braking and steering maneu‐
vers.
2.Check whether the vehicle is fitted with
normal tires or run-flat tires.
Run-flat tires, refer to page 188, are la‐
beled with a circular symbol containing the
letters RSC marked on the tire's sidewall.
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WARNING
A damaged regular tire with low or miss‐
ing tire inflation pressure impacts handling,
such as steering and braking response. Run-flat
tires can maintain limited stability. There is risk
of an accident. Do not continue driving if the
vehicle is not equipped with run-flat tires. Ob‐
serve the hints on run-flat tires and continued
driving with these tires.◀
A low tire inflation pressure might turn on DSC
Dynamic Stability Control.
Actions in the event of a flat tire
Normal tires
1.Identify the damaged tire.
Do this by checking the air pressure in all
four tires.
The tire pressure gauge of the Mobility Sys‐
tem, refer to page 189, can be used for this
purpose.
If the tire inflation pressure in all four tires is
correct, the Tire Pressure Monitor may not
have been initialized. In this case, initialize
the system.
If identification of flat tire damage is not
possible, please contact a dealer’s service
center or another qualified service center or
repair shop.
2.Fix the flat tire using the Mobility System,
refer to page 189.
Use of tire sealant, e.g., the Mobility System,
may damage the TPM wheel electronics. In this
case, have the electronics checked at the next
opportunity and have them replaced if needed.
Run-flat tires
Maximum speed
You may continue driving with a damaged tire
at speeds up to 50 mph/80 km/h.
Continued driving with a flat tire
If continuing to drive with a damaged tire:
1.Avoid sudden braking and steering maneu‐
vers.
2.Do not exceed a speed of 50 mph/80 km/h.3.Check the air pressure in all four tires at the
next opportunity.
If the tire inflation pressure in all four tires is
shown to be correct, it is possible that the
Tire Pressure Monitor did not perform a re‐
set. Then perform the reset.
Possible driving distance with complete loss of
tire inflation pressure:
The possible driving distance after a loss of tire
inflation pressure depends on cargo load, driv‐
ing style and road conditions.
A vehicle with an average load has a possible
driving range of approx. 50 miles/80 km.
A vehicle with a damaged tire reacts differently,
e.g., it has reduced lane stability during brak‐
ing, a longer braking distance and different
self-steering properties. Adjust your driving
style accordingly. Avoid abrupt steering ma‐
neuvers or driving over obstacles, e.g., curbs,
potholes, etc.
Because the possible driving distance depends
on how the vehicle is used during the trip, the
actual distance may be shorter or longer de‐
pending on the driving speed, road conditions,
external temperature, cargo load, etc.
WARNING
Your vehicle handles differently when a
run-flat tire is damaged and has low or missing
tire inflation pressure, for example, your lane
stability is reduced when braking, braking dis‐
tances are longer and the self-steering proper‐
ties will change. There is risk of an accident.
Drive moderately and do not exceed a speed of
50 mph/80 km/h.◀
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Final tire failure
Vibrations or loud noises while driving can indi‐
cate the final failure of a tire.
Reduce speed and stop; otherwise, pieces of
the tire could come loose and cause an acci‐
dent.
Do not continue driving. Contact a dealer’s
service center or another qualified service cen‐
ter or repair shop.
Required inflation pressure check
message
A Check Control message is displayed in the fol‐
lowing situations
▷The system has detected a wheel change,
but no reset was done.
▷Inflation was not carried out according to
specifications.
▷The tire inflation pressure has fallen below
the level of the last confirmation.
In this case:
▷Check the tire pressure and correct as
needed.
▷Carry out a reset of the system after a tire
change.
System limits
The system does not function properly if a reset
has not been carried out, e.g., a flat tire is re‐
ported though tire inflation pressures are cor‐
rect.
The tire inflation pressure depends on the tire's
temperature. Driving or exposure to the sun
will increase the tire's temperature, thus in‐
creasing the tire inflation pressure. The tire in‐
flation pressure is reduced when the tire tem‐
perature falls again. These circumstances may
cause a warning when temperatures fall very
sharply.
The system cannot indicate sudden serious tire
damage caused by external circumstances.
Malfunction
The yellow warning lamp flashes and
then lights up continuously. A Check
Control message is displayed. No flat
tire or loss of tire pressure can be detected.
Examples and recommendations in the follow‐
ing situations:
▷A wheel without TPM electronics, for exam‐
ple an emergency wheel, is mounted: Have
it checked by a dealer’s service center or
another qualified service center or repair
shop as needed.
▷Malfunction: Have system checked by a
dealer’s service center or another qualified
service center or repair shop.
▷TPM was unable to complete the reset. Re‐
set the system again.
▷Interference through systems or devices
with the same radio frequency: After leav‐
ing the area of the interference, the system
automatically becomes active again.
Declaration according to NHTSA/FMVSS
138 Tire Pressure Monitoring System
Each tire, including the spare (if provided)
should be checked monthly when cold and in‐
flated to the inflation pressure recommended
by the vehicle manufacturer on the vehicle
placard or tire inflation pressure label. (If your
vehicle has tires of a different size than the size
indicated on the vehicle placard or tire inflation
pressure label, you should determine the
proper tire inflation pressure for those tires.) As
an added safety feature, your vehicle has been
equipped with a tire pressure monitoring sys‐
tem (TPMS) that illuminates a low tire pressure
telltale when one or more of your tires is signifi‐
cantly under-inflated. Accordingly, when the
low tire pressure telltale illuminates, you should
stop and check your tires as soon as possible,
and inflate them to the proper pressure. Driving
on a significantly under-inflated tire causes the
tire to overheat and can lead to tire failure. Un‐
der-inflation also reduces fuel efficiency and
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tire tread life, and may affect the vehicle's han‐
dling and stopping ability. Please note that the
TPMS is not a substitute for proper tire mainte‐
nance, and it is the driver's responsibility to
maintain correct tire pressure, even if under-in‐
flation has not reached the level to trigger illu‐
mination of the TPMS low tire pressure telltale.
Your vehicle has also been equipped with a
TPMS malfunction indicator to indicate when
the system is not operating properly. The TPMS
malfunction indicator is combined with the low
tire pressure telltale. When the system detects
a malfunction, the telltale will flash for approxi‐
mately one minute and then remain continu‐
ously illuminated. This sequence will continue
upon subsequent vehicle start-ups as long as
the malfunction exists. When the malfunction
indicator is illuminated, the system may not be
able to detect or signal low tire pressure as in‐
tended. TPMS malfunctions may occur for a va‐
riety of reasons, including the installation of re‐
placement or alternate tires or wheels on the
vehicle that prevent the TPMS from functioning
properly. Always check the TPMS malfunction
telltale after replacing one or more tires or
wheels on your vehicle to ensure that the re‐
placement or alternate tires and wheels allow
the TPMS to continue to function properly.
FTM Flat Tire Monitor
The concept
The system does not measure the actual infla‐
tion pressure in the tires.
It detects a tire inflation pressure loss by com‐
paring the rotational speeds of the individual
wheels while moving.
In the event of a tire inflation pressure loss, the
diameter and therefore the rotational speed of
the corresponding wheel changes. This will be
detected and reported as a flat tire.
Functional requirements
The system must have been initialized when
the tire inflation pressure was correct; other‐
wise, reliable flagging of a flat tire is not as‐
sured. Initialize the system after each correc‐
tion of the tire inflation pressure and after
every tire or wheel change.
Status display
The current status of the Flat Tire Monitor can
be displayed on the Control Display, e.g.,
whether or not the FTM is active.
On the Control Display:
1. "Vehicle info"2."Vehicle status"3. "Flat Tire Monitor (FTM)"
The status is displayed.
Initialization
When initializing the once set inflation tire pres‐
sures serve as reference values in order to de‐
tect a flat tire. Initialization is started by con‐
firming the inflation pressures.
Do not initialize the system when driving with
snow chains.
On the Control Display:
1. "Vehicle info"2."Vehicle status"3. "Perform reset"4.Start the engine - do not drive off.5.Start the initialization with "Perform reset".6.Drive away.
The initialization is completed while driving,
which can be interrupted at any time.
The initialization automatically continues when
driving resumes.
Indication of a flat tire
The yellow warning lamp lights up. A
Check Control message is displayed.
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The front window defroster switches off auto‐
matically after a certain period of time.
Rear window defroster
Press button.
The rear window defroster switches off
automatically after a certain period of time.
When GREEN Mode, refer to page 169, is acti‐
vated, the heater output is reduced.
Microfilter/activated-charcoal filter
In external and recirculated air mode the mi‐
crofilter/activated charcoal filter filters dust,
pollen, and gaseous pollutants out of the air.
This filter should be replaced during scheduled
maintenance, refer to page 201, of your vehi‐
cle.
Ventilation
Setting
The air flow directions can be individually ad‐
justed:
▷Direct ventilation:
The air flow is directly pointed onto the per‐
son. The air flow heats or cools noticeably,
depending on the adjusted temperature.
▷Indirect ventilation:
If the vents are fully or partly closed, the air
is directly routed into the car's interior.
Front ventilation▷Turn knob for continuous opening and clos‐
ing of the vents.
▷Swivel the vents to alter the direction of the
vent flow, arrow.
Ventilation in the rear
▷Lever for changing the air flow direction,
arrow 1.
▷Thumbwheel for continuous opening and
closing of the vents, arrow 2.
Parked-car ventilation
The concept
The parked-car ventilation ventilates the vehi‐
cle interior and lowers its temperature, if
needed.
The system can be switched on and off at any
external temperature, either directly or by us‐
ing two preset reel-on times. It remains
switched on for 30 minutes.
Open the vents to allow air to flow out.
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Display in the instrument cluster
GREEN bonus range
An adjusted driving style helps
you extend your driving range.
This may be displayed as the bo‐
nus range in the instrument clus‐
ter.
The bonus range is shown in the range display.
The bonus range is automatically reset every
time the vehicle is refueled.
▷Green display: efficient driving style.▷Gray display: adjust driving style, e. g. by
backing off the accelerator pedal.
Driving style
A bar display in the instrument
cluster indicates your current
driving efficiency.
Mark in the left area, arrow 1:
display for energy recovered by
coasting or when braking.
Mark in the right area, arrow 2: display when
accelerating.
Your driving style's efficiency is shown by the
bar's color:
▷Green display: efficient driving style as long
as the mark moves within the green range.
▷Gray display: adjust driving style, e. g. by
backing off the accelerator pedal.
The display switches to green as soon as all
conditions for fuel-efficiency-optimized driving
are met.
GREEN tip driving instruction
Instructions tell you to switch to a more fuel-ef‐
ficient driving style when you back off the ac‐
celerator.
Information
The driving style display and GREEN Mode tips
in the instrument cluster appear when the
GREEN Mode display is activated.
Activating driving style and GREEN Mode tips:
1. "Settings"2."Instrument cluster"3."GREEN Info"
GREEN tip symbols
An additional symbol and text instructions are
displayed.
SymbolMeasureFor efficient driving back off the ac‐
celerator or delay accelerating to al‐
low time to assess road conditions.
Reduce speed to the selected GREEN
speed.
Steptronic transmission: switch from
M/S to D or avoid manual shift inter‐
ventions.
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Wheels and tiresVehicle features and op‐
tions
This chapter describes all standard, country-
specific and optional features offered with the
series. It also describes features that are not
necessarily available in your car, e. g., due to
the selected options or country versions. This
also applies to safety-related functions and sys‐
tems. The respectively applicable country provi‐
sions must be observed when using the respec‐
tive features and systems.
Tire inflation pressure
Safety information
The tire characteristics and tire inflation pres‐
sure influence the following:
▷The service life of the tires.▷Road safety.▷Driving comfort.
Checking the tire inflation pressure
WARNING
A tire with low or missing tire inflation
pressure impacts handling, such as steering
and braking response. There is risk of an acci‐
dent. Regularly check the tire inflation pressure,
and correct it as needed, for example twice a
month and before a long trip.◀
Tires have a natural, consistent loss of tire infla‐
tion pressure.
Tires heat up while driving, and the tire inflation
pressure increases along with the tire's temper‐
ature. The tire inflation pressure specifications
relate to cold tires or tires with the ambient
temperature.
Only check the tire inflation pressure when the
tires are cold. This means after driving no more
than 1.25 miles/2 km or when the vehicle has
been parked for at least 2 hours.
The displays of inflation devices may under-
read by up to 0.1 bar.
For Flat Tire Monitor: after correcting the tire
inflation pressure, reinitialize the Flat Tire Moni‐
tor.
For Tire Pressure Monitor: after correcting the
tire inflation pressure, reset the Tire Pressure
Monitor.
▷Reinitialize the Flat Tire Monitor.▷Reinitialize the Tire Pressure Monitor.
Pressure specifications
The tire inflation pressure table, refer to
page 183, contains all tire inflation pressure
specifications for the specified tire sizes at the
ambient temperature. The tire inflation pres‐
sure values apply to tire sizes approved by the
manufacturer of the vehicle for the vehicle
type.
To identify the correct tire inflation pressure,
please note the following:
▷Tire sizes of your vehicle.▷Maximum permitted driving speed.
Tire inflation pressures up to 100 mph/
160 km/h
For speeds of up to 100 mph/160 km/h and for
optimum driving comfort, note the pressure
values in the tire inflation pressure table, refer
to page 183, and adjust as necessary.
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Rear window de‐
froster 141, 144
Recirculated-air filter 144
Recirculated-air
mode 140, 143
Recommended fuel
grade 180
Recommended tire
brands 187
Refueling 178
Remaining range 85
Remote control/key 34
Remote control, blocking 35
Remote control, malfunc‐
tion 39
Remote control, replacing the
battery 34
Remote control, univer‐
sal 146
Replacement fuse 214
Replacing parts 203
Replacing the battery, remote
control 34
Replacing wheels/tires 187
Reporting safety malfunc‐
tions 10
RES CNCL button, see camera-
based cruise control 121
RES CNCL button, see Cruise
control 127
Reserve warning, see
Range 85
Reset, Tire Pressure Monitor
TPM 105
Retaining straps, securing
cargo 166
Retreaded tires 187
Roadside parking lights 97
RON recommended fuel
grade 180
Roofliner 17
Roof load capacity 229
Roof-mounted luggage
rack 166
RSC Run Flat System Compo‐
nent, see Run-flat tires 188
Rubber components,
care 223
Run-flat tires 188
S
Safe braking 163
Safety belt reminder for driv‐
er's seat and front passenger
seat 54
Safety belts 53
Safety belts, care 224
Safety switch, windows 47
Safety systems, airbags 101
Saving fuel 168
Screen, refer to Control Dis‐
play 18
Screwdriver 203
Sealant 189
Seat and mirror memory 56
Seat belts, see Safety belts 53
Seat heating, front 52
Seating position for chil‐
dren 60
Seats 50
Selection list in instrument
cluster 88
Selector lever, Steptronic
transmission 75
Sensors, care 224
Service and warranty 8
Service requirements, Condi‐
tion Based Service CBS 201
Service requirements, dis‐
play 85
SET button, see camera-based
cruise control 121
SET button, see Cruise con‐
trol 127
Settings, locking/unlocking 43
Settings, mirrors 57
Settings on Control Display 91
Settings, storing for seat, mir‐
ror 56
Shift paddles on the steering
wheel 76
Side airbag 101
Signaling, horn 14
Signals when unlocking 44
Sitting safely 50
Size 228
Slide/tilt glass roof 47
Snow chains 192
Socket 150
Socket, OBD Onboard Diag‐
nostics 202
Spare fuse 214
Spare tire, see Emergency
wheel 212
Speed, average 89
Speed limit detection, on‐
board computer 89
Speed limiter, display 86
Speed Limit Information 86
Speed warning 91
Split Doors 40
Split doors via remote con‐
trol 38
Split screen 23
Sport displays 90
SPORT program, Dynamic
Driving Control 119
Sport program, transmis‐
sion 76
Stability control systems 117
Standard view, Head-up Dis‐
play 94
Start/stop, automatic func‐
tion 66
Start/Stop button 64
Start function during malfunc‐
tion 35
Starting the engine 65
Status control display,
tires 105
Status information, onboard
monitor 23
Status of Owner's Manual 7
Steering wheel, adjusting 59
Steptronic Sport transmission,
see Steptronic transmis‐
sion 75
Seite 242REFERENCEEverything from A to Z242
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