
When reverse gear is engaged, the cornering light on both sides of the vehicle switches on 
to provide better illumination of the area when manoeuvring.
Switching the fog lights on and off
•Switching on the front fog lights : Pull the light switch ⇒ Fig. 97 out to the first stopper. 
The indicator lamp  in the light switch lights up green.
•Switching on the rear fog lights : pull the light switch all the way out. The indicator lamp 
 in the instrument cluster lights up yellow.
•To switch the fog lights off, press in the light switch or move it to position .
If the automatic headlights are switched on  and the front or rear fog lights are 
switched on, the dipped beam headlights will also be switched on irrespective of the current light 
conditions outside.
In vehicles with a factory-fitted towing bracket: the vehicle's rear fog lights are switched off 
automatically if a trailer with rear fog lights is electrically connected to the vehicle ⇒ Trailer towing.
Light functions
Side lights
If the light switch is in position  both headlights light up with side lights together with parts of 
the tail light clusters, number plate lighting and the buttons in the centre console and the dash 
panel. The daytime running lights also switch on when the ignition is switched on.
If the vehicle is not locked from outside (when the ignition is switched offyf  W K H  F R Q W L Q X R X V  S D U N L Q J  
light on both sides of the vehicle switches on automatically after ten minutes to reduce 12-volt 
vehicle battery discharge ⇒ Switching the parking lights on and off.
Automatic headlights 
When the light switch is in position , the vehicle lighting and the instrument and switch 
lighting will switch on and off automatically depending on the light conditions. When the lights are 
switched on, the indicator lamp in the light switch lights up yellow.
The automatic headlight control function is merely an aid and will not always be able to detect all 
driving situations.
In vehicles with a corresponding equipment level, the switch-on time for automatic headlight control 
can be adjusted in the Infotainment system in the Vehicle settings menu ⇒ Operation and 
display in the Infotainment system.
Cornering light
When cornering slowly or travelling around very tight bends, a static cornering light is switched on 
automatically.
Accidents and serious injuries can occur if roads are not sufficiently illuminated and other 
road users have difficulty seeing the vehicle, or cannot see it at all.
•The light assist functions are designed to provide assistance only. The driver is 
responsible for making sure that the vehicle lights are switched on correctly.
•Always switch the dipped beam headlights on if it is dark, raining or visibility is poor.
WARNING
The side lights or daytime running lights are not bright enough to illuminate the road 
ahead and to ensure that other road users are able to see you.
•Always switch the dipped beam headlights on if it is dark, raining or visibility is poor.
•The rear lights will not be switched on with the daytime running lights. If the rear lights 
are not switched on, the vehicle may not be visible to other road users if it is dark, 
raining, or if visibility is poor.
WARNING
The automatic headlights function ( yf  V Z L W F K H V  W K H  G L S S H G  E H D P  K H D G O L J K W V  R Q  D Q G  
off only when there is a change to the level of brightness.
•Switch on the dipped beam headlights manually if this is necessary due to particular 
weather conditions, e.g. fog.
WARNING 

Switching on the Coming Home function
m/k/a999MKNot in China
•Switch off the ignition.
•Operate the headlight flasher for approximately one second.
The Coming Home lighting is switched on when the driver door is opened. The switch-off delay
starts when the last vehicle door or the boot lid has been closed.
Switching on the Coming Home function
m/k/a999MKOnly in China
•Switch off the ignition.
The Coming Home lighting is switched on when the light switch is in position  and the 
rain/light sensor detects that it is dark.
The switch-off delay starts when the last vehicle door or the boot lid has been closed.
Switching off the Coming home function
•Automatically after the set switch-off delay has elapsed.
•OR: automatically if a vehicle door or the boot lid is still open approximately 30 seconds after 
switching on.
•OR: turn light switch to position  .
•OR: switch on the ignition.
Switching on the Leaving home function
•Unlock the vehicle when the light switch is in position  and the rain/light sensor detects 
that it is dark.
Switching off the Leaving home function
•Automatically after the switch-off delay.
•OR: lock the vehicle.
•OR: turn light switch to position  .
•OR: switch on the ignition.
Some settings can be stored in the user accounts of the personalisation function and 
therefore change automatically when the user account changes ⇒ Personalisation.
Headlights
Headlight range control
Fig. 100 Next to steering wheel: headlight range control ①.
Headlight range control can be used to adjust the light cone in the dipped beam to the vehicle load 
level. This gives the driver the best visibility possible and means that oncoming traffic will not be 
dazzled ⇒.
Depending on the equipment in the vehicle, the headlight range can be adjusted with the control 
⇒ Fig. 100 or in the Vehicle settings⇒ Operation and display in the Infotainment system
menu in the Infotainment system.
•Turn the control ⇒ Fig. 100① or the slide control in the Infotainment system to the necessary 
position (example of the vehicle's load levelyf :
Setting in the 
Infotainment 
system
Setting with 
the control
Setting with 
the control
with sports 
running gear
Front seats occupied and luggage compartment 
empty.
ayf
ayf 

No blower speed is displayed in the rotary control when Climatronic is in automatic mode.
 – Air recirculation mode
•Press the  button.
Air distribution
 – air distribution to the upper body via the vents in the dash panel.
 – air distribution to footwell.
 – air distribution to the upper body and the footwell.
 – air distribution to the windscreen and the footwell.
 – air distribution to the windscreen.
 |  – Defrost function
•m/k/a995MK Manual air conditioning system: turn the right rotary control to position 
⇒ Fig. 109.
•m/k/a995MK Climatronic: press the  button ⇒ Fig. 110.
m/k/a995MKManual air conditioning system: in the defrost function, the air recirculation 
mode switches off and the air conditioning compressor for the cooling system switches on in order 
to dehumidify the air. When the defrost function is switched on, it is not possible to switch the air 
recirculation mode on or the air conditioning compressor off.
m/k/a995MK Climatronic: the air is dehumidified and the blower is set to a high speed.
 – Windscreen heating
•Press the  button.
•Touch the  function button in the air conditioning menu to switch the windscreen heating 
on and off when the engine is running ⇒ Windscreen heating.
The windscreen heating will switch off after a few minutes.
 – Rear window heating
•Press the  button to switch the rear window heating on or off while the engine is running.
The rear window heating will switch off after a maximum of 10 minutes.
 In some countries, the air conditioner compressor can be switched off.
Operating the Climatronic system via the Infotainment system
First read and observe the introductoryinformation and safety warnings⇒
Introduction
Opening the Air conditioning menu
•Press the  button on the control panel.
Display of air conditioning settings
The upper area of the screen shows the current air conditioning settings.
The air conditioning system operating conditions are highlighted in colour:
•Blue: cooling.
•Red: heating.
Adjusting settings
 – Switches Climatronic on and off.
 – Applies temperature settings of driver's seat to all seats.
1yf
To prevent damage to the rear window heating system, do not put stickers over the heating 
elements on the inside of the window.
NOTICE
1yf 

The seat cushions and backrests can be heated electrically when the ignition is switched on.
Operating the seat heating
•Press the button  or  in the control panel in order to switch the seat heating to 
the highest setting.
•Press the  or  button until the desired setting is reached.
•To switch the seat heating off, press the button  or  repeatedly until the LEDs go 
out.
If the ignition is turned on again within around 10 minutes, the most recent driver seat temperature 
setting is automatically activated.
When is it not advisable to switch on the seat heating?
Do not switch on the seat heating if one of the following conditions applies:
•The seat is not occupied.
•The seat is fitted with a protective cover.
•A child seat is installed on the seat.
•The seat cushion is damp or wet.
•The temperature in the vehicle interior or the outside temperature is above +25°C (77°Fyf .
To save fuel, only switch on the seat heating for as long as necessary.
Steering wheel heating
First read and observe the introductoryinformation and safety warnings⇒
Introduction
The steering wheel heating works when the engine is running.
Switching steering wheel heating on and off automatically via the 
Infotainment system
•m/k/a995MKManual air conditioning system: press the  button on the 
Infotainment system and touch the Vehicle and  function buttons.
•m/k/a995MKClimatronic: press the  button on the control panel.
•Touch the  function button to switch the steering wheel heating on and off.
Switching the steering wheel heating on or off together with the seat 
heating (only in vehicles with Climatronicyf
•Press the  button on the control panel.
Anyone experiencing reduced sensitivity to pain or temperature due to medication, 
paralysis or chronic illness (e.g. diabetesyf  F R X O G  V X V W D L Q  E X U Q V  R Q  W K H  E D F N   E X W W R F N V  D Q G  
legs when using the seat heating. These burns may take a long time to heal or may never 
heal fully. Please consult a doctor if you have questions about your own state of health.
•Anyone experiencing reduced sensitivity to pain or temperature should never use the 
seat heating.
WARNING
Wet upholstery can cause a fault in the seat heating and increase the risk of burns.
•Ensure that the seat cushion is dry before the seat heating is used.
•Do not sit on the seat when wearing damp or wet clothing.
•Do not set any damp or wet objects or items of clothing on the seat.
•Do not spill any liquids on the seat.
WARNING
•To avoid damaging the heating elements, do not kneel on the seat or apply sharp 
pressure at a single point on the seat cushion and backrest.
•Liquids, sharp objects and insulating materials, such as a protective cover or child 
seat, may damage the seat heating.
•If the system starts to produce an odour, switch off the seat heating immediately and 
have it checked by a qualified workshop.
NOTICE 

•Touch the  function button.
•Touch the Steering wheel & seat heating linked function button to pair the steering 
wheel heating with the seat heating.
•Press the  button to switch the steering wheel heating on or off with the seat heating.
Selecting a temperature setting (only in vehicles with Climatronicyf
•Press the  button on the control panel.
•Touch the  function button.
•Touch the Setting function button to select a temperature setting.
Three temperature settings are available. The selected setting is saved when the ignition is 
switched off. The temperature setting for the steering wheel heating is unrelated to the temperature 
setting for the seat heating.
Switch-off conditions
The steering wheel heating will be switched off automatically if one of the following conditions is 
met:
•Seat heating for the driver's seat switched off (if 
Steering wheel & seat heating linked is activeyf .
•Power consumption too high.
•Fault in steering wheel heating system.
Windscreen heating
First read and observe the introductoryinformation and safety warnings⇒
Introduction
The windscreen heating works when the engine is running.
Manual windscreen heating
•m/k/a995MKManual air conditioning system: press the  button on the 
Infotainment system and touch the Vehicle and Settings function buttons.
•m/k/a995MKClimatronic: press the  button on the control panel.
•Touch the  function button to switch windscreen heating on or off.
The windscreen heating switches itself off depending on the outside temperature or after 8 minutes 
at the latest.
Automatic windscreen heating
The windscreen heating switches on automatically if there is a risk of condensation building up on 
the windscreen or windows.
•Press the  button on the control panel.
•Touch the  function button in the Infotainment system.
•Touch the Automatic windscreen heating function button to switch automatic 
windscreen heating on or off.
The automatic windscreen heating is also active when the air conditioning system is switched off.
Windscreen heating using the defrost function
The windscreen heating will be switched on when the defrost function is switched on and a sensor 
detects that the windscreen may mist up.
Switch-off conditions
The windscreen heating switches itself off if one of the following conditions is met:
•Power consumption too high.
•Fault in air conditioning system.
•Specified time has elapsed.
Tips and usage notes
First read and observe the introductoryinformation and safety warnings⇒
Introduction
The following tips and operating information will help you use the system correctly. 

Why does the cooling system switch off automatically or cannot be 
switched on?
•The engine is not running.
•The blower is switched off.
•The air conditioning system fuse has blown.
•The ambient temperature is lower than approximately +3°C (+38°Fyf .
•The air conditioning compressor of the cooling system has been temporarily switched off 
because the engine coolant temperature is too high.
•There is a vehicle fault. The air conditioning system should be checked by a qualified workshop.
Settings for optimal road visibility
•Keep the air intake in front of the windscreen free from ice, snow or leaves to improve the 
heating and cooling performance and prevent condensation on the windows ⇒ Vehicle care.
•Do not cover the air vents in the rear of the luggage compartment to allow air to flow through 
the vehicle from the front to the rear.
•The maximum heating output and the fastest window defrosting results are achieved when the 
coolant has reached its operating temperature.
Recommended settings for the heating and fresh air system or manual air 
conditioning system
•Switch off air recirculation mode.
•Set blower to setting  or .
•Set the temperature selector to the middle position.
•Open and position all vents on the dash panel.
•Turn the air distribution regulator to the desired position.
•Manual air conditioning system: press the  button on the control panel to switch the 
cooling system on.
Recommended Climatronic setup
•Press the  button.
•Set the temperature to +22°C (+72°Fyf .
•Open and position the vents on the dash panel.
Air Care Climatronic
The allergen filter of Air Care Climatronic can additionally reduce the amount of pollutants and also 
allergens that enter the vehicle interior.
The filters must be changed regularly to avoid impairing the performance of the air conditioning 
system. If the vehicle is frequently used in severely polluted air, the filter must be replaced between 
service events.
•Press the  button on the control panel.
•Touch the Air Care function button.
•Touch the Active function button to switch the Air Care function on or off.
Dust and pollen filter
The dust and pollen filter must be replaced regularly to prevent impaired performance of the manual 
air conditioning system. If the vehicle is frequently used in severely polluted air, the filter must be 
replaced between service events.
Water under the vehicle
If the humidity and temperature outside the vehicle are high, condensation can drip off the 
evaporator in the cooling system and form a pool underneath the vehicle. This is normal and does 
not indicate a leak.
If the outside humidity is high and the outside temperature low, condensation may evaporate when 
the auxiliary heater is running ⇒ Auxiliary heater and ventilation. If this is the case, steam may 
appear underneath the vehicle. This is not a sign that the vehicle is damaged.
Auxiliary heater and ventilation
 Introduction
This chapter contains information on the followingsubjects:
⇒ Switching the auxiliary heater and auxiliary ventilation on and off
⇒ Programming the auxiliary heater and auxiliary ventilation
⇒ Remote control 

The auxiliary heater runs on for a short time after it is switched off manually or automatically so that 
the remaining fuel in the system can be burnt off.
When the vehicle is at a standstill, the auxiliary heater can be activated up to three times in 
succession for the maximum operating duration.
Operating noises can be heard if the auxiliary heater is switched on.
The 12-volt battery will discharge if the auxiliary heater or ventilation is run several times 
over an extended period. Drive the vehicle for an appropriate distance in order to recharge the 12-
volt vehicle battery.
When parked on an incline, the fuel gauge indication (just above the reserve quantityyf  P D \  
be inaccurate and lead to functional restrictions of the auxiliary heater.
The auxiliary heater may switch on automatically as a supplementary heating measure when 
the engine is started at temperatures below +5°C (+41°Fyf   7 K H  V X S S O H P H Q W D U \  K H D W L Q J  I X Q F W L R Q  L V  
switched off again automatically after a short time.
Programming the auxiliary heater and auxiliary ventilation
First read and observe the introductoryinformation and safety warnings⇒
Introduction
Opening the Auxiliary heater menu
The auxiliary heater is programmed in the Infotainment system.
m/k/a997MK Manual air conditioning system
•Press the  button on the Infotainment system.
•Touch the Vehicle and  function buttons.
m/k/a997MK Climatronic
•Press the  button on the control panel.
•Touch the  function button.
Changing the operating mode
•Open the Auxiliary heater menu.
•Touch the Heating or Ventilation function buttons to change the operating mode.
At high outside temperatures, the auxiliary ventilation function supplies fresh air to the vehicle 
interior and helps prevent a build-up of heat.
Programming the auxiliary heater
Activation is always for one heating or ventilation period only. The departure time must be activated 
for every start.
•Before programming, check that the date and time set in the vehicle are correct ⇒ Vehicle 
settings menu.
•Open the Auxiliary heater menu.
•Press the Adjust button.
•Choose one of the memory locations for a Departure time.
•Touch the Activate function button.
m/k/a995MKManual air conditioning system: the programmed departure time determines 
the time at which the auxiliary heater or ventilation should switch off. The point at which the heating 
or ventilation process starts is determined depending on the programmed operating period.
m/k/a995MK Climatronic: on the basis of the programmed departure time, the vehicle 
automatically calculates the start time for heating or ventilation to the currently set temperature 
depending on the outside temperature.
•Touch the Running time function button under Adjust to set the auxiliary heater 
running time after the heater is switched on with the immediate heat button  or using the 
remote control. 

•Lever open the battery cover in upward direction using the object.
•Push the battery cover slightly in the direction of the arrow.
•Remove the battery cover.
•Remove the button cell.
•Insert a new button cell of the same type, paying attention to the correct polarity.
•Insert the battery in the housing of the remote control.
•Push the battery cover in the opposite direction to the arrow ⇒ Fig. 112 until it engages.
Dispose of discharged batteries in accordance with regulations governing the protection of 
the environment.
The battery in the remote control may contain perchlorate. Please comply with legislation 
regarding disposal.
Driving
Notes on driving
 Introduction
This chapter contains information on the followingsubjects:
⇒ Pedals
⇒ Gear-change indicator
⇒ Driving economically
⇒ Think Blue. Trainer.
⇒ Information on the brakes
⇒ Driving with a loaded vehicle 
⇒ Driving with an open boot lid
⇒ Driving through water on roads
⇒ Running in the engine
⇒ Using the vehicle in other countries and continents
⇒ Troubleshooting
Pedals
Swallowing batteries with a diameter of 20 mm, or other button cells, can result in severe 
or even fatal injuries within a very short period of time.
•Always keep the remote control key, key ring with batteries, spare batteries, round 
cells and other batteries that are larger than 20 mm out of the reach of children.
•Call for medical help immediately you suspect that someone has swallowed a battery.
DANGER
•The remote control contains electronic components. Protect the remote control from 
moisture, excessive vibration and direct sunlight.
•Unsuitable batteries can damage the remote control. Replace discharged batteries only 
with new batteries of the same voltage rating, size and specification.
•Ensure that the battery is fitted the right way round.
NOTICE
Driving under the influence of alcohol, drugs, medication or narcotics can cause serious 
accidents and fatal injuries.
•Alcohol, drugs, medication and narcotics can severely impair perception, reaction 
times and driving safety. This could cause you to lose control of the vehicle.
WARNING
Rapid acceleration can cause loss of traction and skidding, particularly on slippery roads. 
This can cause you to lose control of the vehicle, which can lead to accidents and serious 
injuries.
•Always adjust your driving style in accordance with the flow of traffic.
•The kickdown function or fast acceleration should only be used if the visibility, 
weather, road and traffic conditions permit.
WARNING