
FTM Flat Tire MonitorThe concept
The system detects tire inflation pressure loss
on the basis of rotation speed differences be‐
tween the individual wheels while driving.
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.
The system does not measure the actual infla‐
tion pressure in the tires.
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 canbe 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
pressures serve as reference values in order to
detect a flat tire. Initialization is started by con‐
firming the tire 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.Switch on drive readiness – 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.
There is a flat tire or a major loss in tire
inflation pressure.
1.Reduce your speed and stop cautiously.
Avoid sudden braking and steering maneu‐
vers.2.Identify the damaged wheel. Do so by
checking the tire inflation pressure using
the Mobility System. If the tire inflation
pressure in all tires is correct, the Flat Tire
Monitor may not have been initialized. In
this case, initialize the system.3.Repair flat tire with the Mobility System, re‐
fer to page 174, or replace the damaged
wheel.
If a Mobility System is not available, contact
the service center.
When a flat tire is indicated, DSC Dynamic Sta‐
bility Control is switched on if needed.
System limits Sudden tire damage
Sudden serious tire damage caused by
external circumstances cannot be recognized
in advance.◀
A natural, even tire inflation pressure loss in all
four tires will not be recognized. Therefore,
check the tire inflation pressure regularly.
Seite 96ControlsSafety98

When you approach a curve the system may
briefly report vehicles in the next lane due to
the bend of the curve. If the system deceler‐
ates you may compensate it by briefly acceler‐
ating.
After releasing the gas pedal the system is re‐
activated and controls speed independently.
Driving away In some situations, the vehicle cannot drive off
automatically; for example:
▷On steep inclines.▷From behind bumps in the road.
In these cases, step on the accelerator pedal.
Malfunction
A Check Control message is displayed if the
system fails.
The system may not be fully functional in the
following situations:
▷When an object was not correctly de‐
tected.▷In heavy fog, rain, sprayed water or snow‐
fall.▷In tight curves.▷If the camera viewing field or the front
windshield are dirty or covered.▷When driving toward bright lights.▷Up to 20 seconds after drive readiness is
switched on via the Start/Stop knob.▷During calibration of the camera immedi‐
ately after vehicle shipment.Cruise control
The concept The system maintains a preset speed via the
buttons on the steering wheel. The system
brakes on downhill gradients if engine braking
is insufficient.
General information
Depending on the driving settings, the features
of the cruise control can change in certain
areas.
Hints Unfavorable conditions
Do not use the system if unfavorable
conditions make it impossible to drive at a con‐
stant speed, e.g.:▷On winding roads.▷In heavy traffic.▷On slippery roads, in fog, snow or rain, or
on a loose road surface.
Otherwise, you could lose control of the vehi‐
cle and cause an accident.◀
At a glance
Buttons on the steering wheel
Press buttonFunctionSystem on/off, interruptStore speedResume speedRocker reel: change, hold,
store speedSeite 113Driving comfortControls115

Things to remember when drivingVehicle features and options
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
systems.
Breaking-in period
General information Moving parts need time to adjust to one an‐
other (break-in time).
The following instructions will help accomplish
a long vehicle life and good efficiency.
Range Extender The full performance of the Range Extender is
available after a brief operating period and is
only minimally restricted during the run-in
phase.
Control of the Range Extender during and after
the run-in phase, as well as the activation of
the full performance, are preset depending on
the system and take place automatically.
Tires
Tire traction is not optimal due to manufactur‐
ing circumstances when tires are brand-new;
they achieve their full traction potential after a
break-in time.
Drive conservatively for the first
200 miles/300 km.
Brake system
Brakes require an initial break-in period of ap‐
prox. 300 miles/500 km to achieve optimal per‐
formance between brake discs and brakepads. Drive moderately during this break-in pe‐
riod.
Following part replacement
The same break-in procedures should be ob‐
served if any of the components above-men‐
tioned have to be renewed in the course of the
vehicle's operating life.
Using eDRIVE efficiently The concept
eDRIVE operates automatically. Proactive driv‐
ing utilizes energy consumption and energy re‐
covery optimally. Energy recovery is used to
charge the high-voltage battery. It is important
for the supply of electrical components and
thus a prerequisite for an extensive range. En‐
ergy consumption and recovery depend very
much, among other things, on your driving
style.
Optimizing driving style
Performance display The driving style can be optimized using the
performance display.
The energy recovery occurs during coasting
and braking and is displayed in the perform‐
ance display by the accelerator pedal indicator.
Seite 142Driving tipsThings to remember when driving144

Wheels and tiresVehicle features and options
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
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
Check the tire inflation pressure regularly
Regularly check the tire inflation pres‐
sure, and correct it as needed: at least twice a
month and before a long trip. If you fail to ob‐
serve this precaution, you may be driving on
tires with incorrect tire pressures, a condition
that may not only compromise your vehicle's
driving stability, but also lead to tire damage
and the risk of an accident.◀
Tires have a natural, consistent loss of tire in‐
flation pressure.
Tires heat up while driving, and the tire infla‐
tion pressure increases along with the tire's
temperature. The tire inflation pressure speci‐
fications 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 1.45 psi/0.1 bar.
For Flat Tire Monitor: after correcting the tire
inflation pressure, reinitialize the Flat Tire
Monitor.
For Tire Pressure Monitor: after correcting the
tire inflation pressure, reset the Tire Pressure
Monitor.
Tire inflation pressure specifications
The tire inflation pressure table, refer to
page 171, contains all tire inflation pressure
specifications for the specified tire sizes at the
ambient temperature. Tire inflation pressure
specifications apply to approved tire sizes and
recommended tire brands. This information
can be obtained from your service center.
To identify the correct tire inflation pressure,
please note the following:▷Tire sizes of your vehicle.
Tire fill pressures
To achieve optimum driving comfort, note the
pressure specifications in the Tire inflation
pressure table, refer to page 171, and adjust
as needed.
These pressure values can also be found on
the tire inflation pressure label on the driver's
side on the rear door.
Seite 168MobilityWheels and tires170

Range Extender, mainte‐nance run 67
Rearview camera 120
Rearview mirror 55
Rear window de‐ froster 128, 131
Recirculated-air filter 132
Recirculated-air mode 128, 131
Recommended fuel grade 168
Recommended tire brands 174
Refueling 165
Remaining range 82
Remote control/key 36
Remote control, malfunc‐ tion 40
Replacement fuse 192
Replacing wheels/tires 173
Reporting safety defects 10
RES button 112
RES button, see Camera- based cruise control,
ACC 109
RES button, see Cruise con‐ trol 115
Reserve warning, refer to Range 82
Reset, Tire Pressure Monitor TPM 96
Retaining straps, securing cargo 149
Retreaded tires 174
Roadside parking lights 90
RON recommended fuel grade 168
Roofliner 17
Rope for tow-starting/ towing 195
Rubber components, care 200
S Safe braking 146 Safety 7
Safety belt reminder for driv‐ er's seat and front passen‐
ger seat 53
Safety belts 53
Safety belts, care 200
Safety of the high-voltage system 196
Safety systems, airbags 92
Screen, refer to Control Dis‐ play 18
Screw thread, see screw thread for tow fitting, screw
thread for tow fitting 196
Sealant 174
Seat belts, refer to Safety belts 53
Seat heating, front 52
Seating position for chil‐ dren 58
Seats 51
Secondary lights, rear 190
Selection list in instrument cluster 84
Sensors, care 201
Service and warranty 8
Service requirements, Condi‐ tion Based Service
CBS 185
Service requirements, dis‐ play 82
Service, Roadside Assis‐ tance 194
Services, ConnectedDrive 6
SET button, see Camera- based cruise control,
ACC 109
SET button, see Cruise con‐ trol 115
Settings, locking/unlock‐ ing 45
Settings, mirrors 55
Settings on Control Dis‐ play 87
Side airbags 92
Signaling, horn 14 Signals when unlocking 46
Sitting safely 51
Size 204
Slide/tilt glass roof 49
Smallest turning radius 204
Snow chains 178
Socket 134
Socket, OBD Onboard Diag‐ nostics 186
SOS button 193
Spare fuse 192
Speed, average 86
Speed limit detection, com‐ puter 86
Speed limiter, display 83
Speed Limit Information 83
Speed warning 86
Split screen 23
Stability control systems 106
Standard charging cable, see Level 1 charging cable 157
Standard charging, see Level 1 Charging 161
Standing air conditioning, re‐ mote control 46
Start/Stop button 62
Start function during malfunc‐ tion 37
Stationary climate con‐ trol 132
Status control display, tires 95
Status information, iDrive 22
Status of Owner's Manual 7
Steering wheel, adjusting 57
Storage compartments 138
Storage compartments, loca‐ tions 138
Storage, tires 174
Storing the vehicle 201
Summer tires, tread 172
Sun visor 134
Supplementary text mes‐ sage 80
Switch for Dynamic Driv‐ ing 107 Seite 212ReferenceEverything from A to Z214