The auxiliary heater and ventilation
system allows the vehicle interior to be
heated in winter and ventilated in
summer. Operation of the system
allows ice, condensation and a thin
covering of snow to be cleared from the
windscreen. The auxiliary heater is
supplied with fuel from the vehicle fuel
tank and can be operated when the
vehicle is stationary with the ignition
switched off. The auxiliary ventilation
system is supplied with power by the
12-volt vehicle battery.
Auxiliary heater exhaust system
The emissions produced by the auxiliary heater are removed via an exhaust pipe fitted underneath
the vehicle. The exhaust pipe must not be blocked by snow, mud or other objects.
Switching the auxiliary heater and auxiliary ventilation on and off
First read and observe the introductoryinformation and safety warnings⇒
Introduction
The auxiliary heating can be operated only when the ignition is switched off. If the ignition is
switched on while the auxiliary heater is working, the auxiliary heater continues to run to provide
additional heat.
Switching on the auxiliary heater
•Press the immediate heat button on the control panel ⇒ Front controls.
•Press the button on the remote control ⇒ Remote control.
•Program a departure time ⇒ Programming the auxiliary heater and auxiliary ventilation.
The auxiliary heater heats up the vehicle interior to a temperature of at least 22°C.
The auxiliary heater will not switch on if the 12-volt vehicle battery has a low charge level or the fuel
tank is empty.
Switching off the auxiliary heater manually
•Press the immediate heat button on the control panel ⇒ Front controls.
•Press the button on the remote control ⇒ Remote control.
•Touch the function button in the Infotainment system ⇒ Programming the auxiliary heater
and auxiliary ventilation.
Auxiliary heater switches off automatically
•When the programmed departure time is reached, or after the programmed operating period
has elapsed ⇒ Programming the auxiliary heater and auxiliary ventilation.
•If the indicator lamp or lights up (fuel gauge) ⇒ Fuel gauge.
•If the charge level of the 12-volt vehicle battery is too low ⇒ 12-volt vehicle battery.
The fumes from the auxiliary heater contain among other things carbon monoxide, which
is an odourless and colourless poisonous gas. Carbon monoxide can cause people to
lose consciousness. It can also cause death.
•Never start or run the auxiliary heater in unventilated or closed rooms.
•Never programme the auxiliary heater so that it is switched on and run in unventilated
or enclosed spaces.
WARNING
Parts of the auxiliary heater exhaust system become very hot. This can cause fires.
•Park the vehicle so that no part of the exhaust system can come into contact with any
inflammable material underneath the vehicle, e.g. dry grass.
WARNING
Do not place any food, medicine or any other temperature-sensitive items in front of the
vents. Heat-sensitive food, medicine and other items could be either damaged or rendered
useless.
NOTICE
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 quantity) may
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°F). The supplementary heating function is
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.
Programming check
If a departure time has been activated, the LED in the immediate heat button will light up on
the Climatronic control panel for approximately ten seconds after the ignition is switched off.
Remote control
Fig. 112 Auxiliary heater: remote control (left) with battery compartment (right).
First read and observe the introductoryinformation and safety warnings⇒
Introduction
Switching the auxiliary heater on and off using the remote control
•m/k/a995MK Switch on: press the button ⇒ Fig. 112.
The auxiliary heater is switched on when the LED on the remote control lights up green.
•m/k/a995MKSwitch off: press the button ⇒ Fig. 112.
The auxiliary heater is switched off when the LED on the remote control lights up red.
LED in the remote control
The LED ⇒ Fig. 112② indicates various operating states after you press a button.
Lit up
GreenAuxiliary heater is switched on.RedAuxiliary heater is switched off.
Flashes irregularly
GreenAuxiliary heater disabled: the fuel tank is almost empty, the voltage of the 12-volt vehicle
battery is too low or a malfunction has occurred. Refuel and drive for a sufficiently long time in order
to charge the 12-volt vehicle battery or go to a qualified workshop.
Flashes regularly
Red or greenSwitch-on or switch-off signal not received. Reduce your distance from the vehicle.
Lights up or flashes
OrangeThe button cell (battery) in the remote control is weak. Replace the button cell.
Range
The remote control has a range of several hundred metres when the button cell is fully charged.
•Keep a distance of at least two metres between the remote control and vehicle.
•Avoid obstacles between the remote control and vehicle.
•Hold the remote control with the aerial⇒ Fig. 112① pointing vertically upwards.
•Do not cover the aerial.
Poor weather conditions or a weak button cell will significantly reduce the range.
Replacing the button cell in the remote control
The button cell in the remote control must be replaced if the indicator lamp no longer lights up.
•Insert a suitable object, e.g. a screwdriver, in the recess on the side ⇒ Fig. 112 in the direction
of the arrow.
Never programme the auxiliary heating system so that is switched on and run in
unventilated or enclosed spaces. The fumes from the auxiliary heater contain among other
things carbon monoxide, which is an odourless and colourless poisonous gas. Carbon
monoxide can cause people to lose consciousness. It can also cause death.
WARNING
System limits
First read and observe the introductoryinformation and safety warnings⇒
Introduction
Front Assist has physical and system-related limitations. From the driver's perspective, some Front
Assist reactions may therefore occur unexpectedly or with a delay in certain circumstances. You
should therefore always be prepared to take full control of the vehicle if necessary.
•In tight bends.
•If the accelerator is fully depressed.
•If Front Assist is switched off or faulty.
•If TCS is switched off manually.
•If ESC is taking corrective action.
•If there is a fault in several brake lights on the vehicle or on a trailer with an electrical
connection to the vehicle ⇒.
•If the radar sensor is dirty or covered.
•If there are metal objects, e.g. tracks in the road or metal plates used in roadworks, or road
signs, above and adjacent to the road.
•If the vehicle is reversing.
•Under hard acceleration.
•In snow or heavy rain.
•In case of narrow vehicles, e.g. motorbikes.
•If vehicles are travelling slightly to the left or right of your vehicle.
•If vehicles are crossing in front of your vehicle.
•If there is oncoming traffic.
•If pedestrians are standing in front of the vehicle, approaching the vehicle, or moving in the
same direction as the vehicle.
•In complex driving situations, e.g. at traffic islands.
•In unclear traffic situations, e.g. vehicles ahead are heavily braking or turning off.
•When loads or attachment parts on other vehicles protrude to the side, rear or above the normal
dimensions of the vehicle.
Switching off Front Assist
•If the vehicle is being towed.
•If the vehicle is on a rolling road test bed.
•If the vehicle is driven in areas other than public roads.
•If the radar sensor is faulty.
•After external force on the radar sensor, e.g. after a rear-end collision.
•In the event of multiple unwanted interventions.
•If the radar sensor is covered temporarily by any auxiliary equipment, e.g. auxiliary headlights.
•If the vehicle is loaded onto a truck, car ferry or motorail train.
The intelligent Pedestrian Monitoring technology cannot overcome the laws of physics,
and functions only within the limits of the system. Never let the extra convenience
afforded by the Pedestrian Monitoring system tempt you into taking any risks when
driving. The driver is always responsible for braking in time.
•If Pedestrian Monitoring issues a warning, brake your vehicle immediately depending
on the traffic situation or avoid the pedestrian.
•The Pedestrian Monitoring system cannot prevent accidents and serious injuries on its
own.
•The Pedestrian Monitoring system can issue unnecessary warnings and carry out
unwanted braking interventions in complex driving situations, e.g. on a twisting main
road.
•The Pedestrian Monitoring system can issue unnecessary warnings and carry out
unwanted braking interventions when its function is impaired, e.g. if the radar sensor is
covered or its position has been changed.
•Be prepared to take over control of the vehicle yourself at all times.
WARNING
Failure to switch off Front Assist in the situations mentioned can result in accidents and
serious injuries.
WARNING
•OR: depending on the vehicle equipment, by means of the button for the driver assist systems
⇒ Button for driver assist systems.
•OR: depending on the vehicle equipment, in the Driver assistance menu in the Infotainment
system ⇒ Operation and display in the Infotainment system.
Function
Rear Traffic Alert monitors the traffic crossing behind the vehicle when reversing out of a parking
space or manoeuvring. Rear Traffic Alert functions using radar sensors in the rear bumper.
Key to ⇒ Fig. 150:
Critical situation. Do not drive on!Possible critical situation.
Detection of a critical situation can also take place acoustically:
•A warning signal will sound and a text message will be displayed in the instrument cluster for
vehicles without Park Distance Control.
•A warning signal will sound with the continuous Park Distance Control tone if Park Distance
Control is installed in the vehicle. If the Park Distance Control is deactivated, no warning can be
given to the driver and the Rear Traffic Alert system will also be switched off temporarily.
If there is a fault in the system's scanned area, the yellow indicator lamp lights up .
Automatic braking intervention to minimise damage
If Rear Traffic Alert detects an approaching road user and the driver has not pressed the brake, the
system can brake automatically.
The Rear Traffic Alert helps the driver to prevent damage by initiating an automatic braking
intervention. Automatic braking intervention takes place when reversing at speeds of between
1-12 km/h (1-7 mph). The vehicle is held stationary for up to two seconds after vehicle standstill has
been detected.
After automatic braking intervention is activated to prevent damage to the vehicle, the system
requires approximately ten seconds before it can activate another automatic braking intervention.
The automatic braking intervention can be interrupted by pressing the accelerator or brake pedal
sharply and taking control of the vehicle.
Troubleshooting
First read and observe the introductoryinformation and safety warnings⇒
Introduction
No sensor visibility, error message, system switches itself off
•Clean the radar sensors or remove stickers or accessories from the radar sensors ⇒ Caring for
and cleaning the vehicle exterior.
•Check whether any damage is visible.
The system is not responding as expected
•The radar sensors are dirty ⇒ Caring for and cleaning the vehicle exterior. The sensor visibility
may be impaired by dirt and snow or also residue from cleaning agents or coatings.
•The prerequisites for system operation must be met ⇒ System limits.
•The radar sensors are covered by water.
•The vehicle is damaged in the area of the radar sensors, e.g. caused by parking collisions.
•The detection ranges of the radar sensors are blocked by add-on parts, e.g. bicycle carriers.
•Changes have been made to the paintwork in the area of the radar sensors or structural
modifications have been made, e.g. on the vehicle front end or the running gear.
•Tinting foils have been retrofitted on the side windows.
The intelligent technology of the lane change system including Rear Traffic Alert cannot
overcome the laws of physics, and functions only within the limits of the system. Do not
let the auxiliary function of the Rear Traffic Alert tempt you to take any risks while driving
– this can cause accidents. The system is not a substitute for the full concentration of the
driver.
•Never use the system with impaired vision or in unpredictable traffic situations, e.g. on
extremely busy roads or across several lanes.
•Always pay attention to the area around the vehicle – cyclists and pedestrians are
often not clearly detected.
•The Rear Traffic Alert will not always independently bring the vehicle to a complete
stop.
WARNING
•Perpendicular parking (mode 1): reverse parking perpendicular to the road.
•Parallel parking (mode 2): reverse parking parallel to the road.
•Trailer support (mode 3): support when hitching a trailer to the vehicle.
•Crossing traffic (mode 4): observing crossing traffic.
System limits
The rear view camera system shows only two-dimensional images on the screen. The lack of depth
of field means that potholes and protruding objects on the ground may only be detected with
difficulty, or may not be detected at all.
The rear view camera system may not always be able to detect objects such as thin rails, fences,
posts, trees etc. This could result in damage to your vehicle.
The system displays the orientation lines irrespective of the area surrounding the vehicle. There is
no automatic obstacle detection. Drivers must judge for themselves whether the vehicle will fit into
the parking space.
Switching on and off
First read and observe the introductoryinformation and safety warnings⇒
Introduction
Switching on the rear view camera system
•Select reverse gear.
•OR: press the button.
Switching off the rear view camera system
Drive forwards at a speed of at least 15 km/h (9 mph).
Display representation
First read and observe the introductoryinformation and safety warnings⇒
Introduction
The image of the rear view camera system is displayed in the Infotainment system.
The functions and displays depend on the vehicle equipment and may differ from each other.
The rear view camera system hides all orientation lines and guiding functions when the factory-
fitted towing bracket is electrically connected to the trailer ⇒ Trailer towing.
Settings
You can make settings by means of the function buttons when the rear view camera system is
switched on. Some setting options depend on the vehicle equipment.
Function buttons and symbols of the rear view camera system:
xClose current display.Switch to perpendicular parking (mode 1) ⇒ Parking perpendicular to
the road (mode 1).Switch to parallel parking (mode 2) ⇒ Parking parallel to the road
(mode 2).Switch to trailer support (mode 3).Switch to crossing traffic (mode 4).Adjust
display: brightness, contrast, colour.Switch to Park Distance Control ⇒ Park Distance
Control.Show Park Distance Control display.Hide Park Distance Control display.
Switch Park Distance Control sound on and off.Turn steering wheel (mode 2).Stop
vehicle (mode 2).
Orientation lines
Green horizontal line: extension of the vehicle.
Red lateral line: a yellow line turns red if a change in the steering input is necessary (mode 2).
Yellow lines: vehicle path depending on the steering angle.
Yellow auxiliary boxes: front and rear limits of the parking space (mode 2).
Green lateral line: turning point when driving into a parking space (mode 2).
Using images from the camera to estimate the distance from obstacles (people, vehicles
etc.) is inaccurate and could cause accidents and severe injuries.
•Camera lenses enlarge and distort the field of vision and make objects appear different
and inaccurate on the screen.
WARNING
Red and green frames: vehicle outline (mode 2).
Trailer support (mode 3)
In vehicles with a factory-fitted towing bracket, the trailer support function can be used when
approaching a trailer drawbar. The powerful zoom level used in this mode means that obstacles
behind the vehicle appear very late.
Auxiliary lines are shown on the Infotainment system.
Red line: position of the towing bracket.
Green lines: distance to towing bracket. The distance intervals are around 0.1 m in each case.
Orange line: predicted path of the towing bracket, depending on the steering angle.
Crossing traffic (mode 4)
This display representation helps the driver to monitor traffic behind the vehicle and can be used in
situations such as driving out of a garage or narrow exits, for example.
Prerequisites
First read and observe the introductoryinformation and safety warnings⇒
Introduction
The following prerequisites must be met for detection of a parking space:
•Do not exceed a speed of approximately 15 km/h (9 mph).
•Width of the parking space: vehicle width + 0.2 m.
•Distance: position the vehicle approximately one metre from the parking space (mode 2 only).
•Length of the parking space: approx. 8 m (mode 2 only).
The following conditions must be met in order to display a correct image:
•The boot lid is closed.
•The surrounding area has a flat surface.
•Vehicle does not have a heavy load at the rear.
Parking perpendicular to the road (mode 1)
Fig. 155 Infotainment system screen display: parking using the rear view camera system, mode 1.
First read and observe the introductoryinformation and safety warnings⇒
Introduction
Key to ⇒ Fig. 155:
Road.
Parking space.
Side limit of the parking space.
Rear limit of the parking space.
Driving into a parking space
•Press the or button before driving past the selected parking space.
•With the rear view camera system switched on and operational, select mode 1 .
•Position the vehicle in front of the parking space ⇒ Fig. 155②.
•Steer so that the yellow lines ③ lead into the parking space . The green and yellow lines
must be aligned with the side limit lines ③.
•Stop when the red line reaches the rear limit ④.
Parking parallel to the road (mode 2)
Fig. 156 Infotainment system display: rear view camera system, mode 2.
First read and observe the introductoryinformation and safety warnings⇒
Introduction
Key to ⇒ Fig. 156:
Road.
Obstacle or auxiliary box.
Side limit of the parking space.
Obstacle or auxiliary box.
Driving into a parking space
•If applicable, press the button before driving past the selected parking space.
•With the rear view camera system switched on and operational, select mode 2 .
•Activate the turn signal for the side of the street on which you want to park.
•Position the vehicle parallel to the parking row at a distance of around one metre.
•If obstacles protrude from the auxiliary boxes, look for a new parking space or reposition the
vehicle.
•Select reverse gear. A red frame shows the target position of your vehicle.
•Turn the steering wheel so that the red frame moves between the auxiliary boxes and turns
green. Hold the steering wheel in this position and start moving slowly.
•Reverse when an arrow appears. Yellow and green lines are displayed. The arrow shows the
distance still to be covered.
•Leave the steering wheel in the set position while reversing. Make necessary changes to the
steering angle when a steering instruction is displayed next to the steering wheel symbol .
•Reverse until the stop sign is displayed or the green line is aligned with the side limit of the
parking space.
•Stop the vehicle. Steer in the opposite direction until the steering lock is reached.
•Reverse until the stop symbol is displayed or until the red line reaches the rear limit.
Troubleshooting
First read and observe the introductoryinformation and safety warnings⇒
Introduction
No camera visibility, error message, system switches itself off
•Clean the camera or remove stickers or accessories from the camera ⇒ Caring for and cleaning
the vehicle exterior.
•Check whether any damage is visible.
The system is not responding as expected
•The camera is dirty ⇒ Caring for and cleaning the vehicle exterior. The camera visibility may be
impaired by dirt and snow or also residue from cleaning agents or coatings.
•The system requirements must be met ⇒ Prerequisites.
•The camera is covered by water.
•The factory-fitted towing bracket is electrically connected with the trailer ⇒ Trailer towing.
•The vehicle is damaged in the area around the camera, e.g. caused by parking collisions.
•The detection range of the camera is blocked by add-on parts, e.g. bicycle carriers.