Refuelling the vehicle
WARNING Risk of fire or explosion from fuel
Fuels are highly flammable.
Fire, naked flames, smoking and creation of sparks must be avoided.
Switch off the ignition and, if available, the stationary heater, before and while refuelling the vehicle.
WARNING Risk of injury from fuels
Fuels are poisonous and hazardous to your health.
Do not swallow fuel or let it come into contact with skin, eyes or clothing.
Do not inhale fuel vapour.
Keep children away from fuel.
Keep doors and windows closed during the refuelling process.
If you or other people come into contact with fuel, observe the following:
Immediately rinse fuel off your skin with soap and water.
If fuel comes into contact with your eyes, immediately rinse them thoroughly with clean water. Seek medical attention immediately.
If you swallow fuel, seek medical attention immediately. Do not induce vomiting.
Change immediately out of clothing that has come into contact with fuel.
WARNING Risk of fire and explosion due to electrostatic charge
Electrostatic charge can ignite fuel vapour.
Before you open the fuel filler cap or take hold of the pump nozzle, touch the metallic vehicle body.
To avoid creating another electrostatic charge, do not get into the vehicle again during the refuelling process.
WARNING Risk of fire from fuel mixture
Vehicles with a diesel engine:
While the engine is running, component parts in the exhaust system may overheat without warning.
Never refuel using petrol.
Never mix petrol with diesel fuel.
NOTE Damage caused by the wrong fuel
Vehicles with a petrol engine:
Even small amounts of the wrong fuel could result in damage to the fuel system, the engine and the emission control system.
Only refuel using unleaded, sulphur-free fuel that conforms to European EN 228, or an equivalent specification.
Fuel of this specification may contain up to 10% ethanol. Your vehicle is suitable for use with E10 fuel.
Never refuel with one of the following fuels:
diesel
regular petrol with an octane number lower than 91 RON
petrol with more than 10% ethanol by volume, e.g. E15, E20, E85, E100
petrol with more than 3% methanol by volume, e.g. M15, M30
petrol with additives containing metal
If you have accidentally refuelled with the wrong fuel:
do not switch the ignition on.
Consult a qualified specialist workshop.
NOTE Damage caused by the wrong fuel
Vehicles with a diesel engine:
Even small amounts of the wrong fuel could result in damage to the fuel system, the engine and the emission control system.
Only refuel using sulphur-free diesel fuel that conforms to European standard EN 590, or an equivalent specification.
In countries without sulphur-free diesel fuel, refuel using only low-sulphur diesel fuel with a sulphur content less than 50 ppm.
Never refuel using any of the following fuels:
petrol
marine diesel
heating oil
pure bio-diesel fuel or vegetable oil
paraffin or kerosene
If you accidentally refuel with the wrong fuel:
Do not switch the ignition on.
Consult a qualified specialist workshop.
NOTE Do not use diesel to refuel vehicles with a petrol engine
If you have accidentally refuelled with the wrong fuel:
do not switch the ignition on. Otherwise fuel can enter the engine.
Even small amounts of the wrong fuel could result in damage to the fuel system and the engine. The repair costs are high.
Consult a qualified specialist workshop.
Have the fuel tank and fuel lines drained completely.
NOTE Do not use petrol to refuel vehicles with a diesel engine
If you have accidentally refuelled with the wrong fuel:
do not switch the ignition on. Otherwise, fuel can enter the fuel system.
Even small amounts of the wrong fuel could result in damage to the fuel system and the engine. The repair costs are high.
Consult a qualified specialist workshop.
Have the fuel tank and fuel lines drained completely.
NOTE Damage to the fuel system caused by overfilled fuel tanks
Only fill the fuel tank until the pump nozzle switches off.
Requirements:
The vehicle is unlocked.
Pressure in the fuel tank has been released before refuelling.
Do not get into the vehicle again during the refuelling process. Otherwise, electrostatic charge could build up again.
Observe the notes on operating fluids and fuel.
The recommended octane number for your vehicle can be found on the information label in the fuel filler flap.
Depressurising the fuel tank
Pull button 
.
. Indicator lamp 
flashes and the Please wait Depressurising tank message appears in the multifunction display.
If the fuel filler flap is open, indicator lamp lights up continuously.
The Tank is depressurised Ready for refuelling message appears in the multifunction display.
In the following situations there is a malfunction:
indicator lamp
flashes initially and then goes out the yellow
engine diagnosis warning lamp lights up
Opening the fuel filler flap may, in exceptional cases, take up to 15 minutes.
Press on the back area of fuel filler flap .
. Turn the fuel filler cap anti-clockwise and remove it.
Insert the fuel filler cap from above into bracket .
. Completely insert the pump nozzle into the tank filler neck, hook in place and refuel.
Only fill the fuel tank until the pump nozzle switches off.
Vehicles with a diesel engine: the tank filler neck is designed for refuelling at diesel filling pumps.
Vehicles with a diesel engine: when the fuel tank is completely empty, top up with at least 5 litres of diesel.
Vehicles with a diesel engine: use a filler neck with a large diameter for vehicles with a diesel engine when topping up fuel from a fuel can. Otherwise, the filler neck cannot slide into the tank.
Replace the cap on the filler neck and turn clockwise until it engages audibly.
Close fuel filler flap .
. Close the fuel filler flap before locking the vehicle.
Resetting values on the Trip menu of the on-board computer
The spelling on the main menu displayed may differ. Therefore, observe the menu overview for the instrument display MoreMore.
You can reset the values of the following functions:
Trip distance
Trip computer From start and From reset
ECO display More
To select the function to be reset:
swipe upwards or downwards on the left-hand Touch Control. Press the left-hand Touch Control.
Select Yes .
Press the left-hand Touch Control.
If you press and hold the left-hand Touch Control, the values of the function will be reset immediately.
Topping up AdBlue®
NOTE Engine damage due to AdBlue® being in the fuel
AdBlue® must not be used to fill the fuel tank.
Only use AdBlue® to fill the AdBlue® tank.
Do not overfill the AdBlue® tank.
NOTE Contamination of the vehicle interior due to AdBlue® leakage
After topping up, carefully close the AdBlue® refill container.
Avoid carrying AdBlue® refill containers permanently in the vehicle.
Requirements:
The vehicle is unlocked.
The following messages appear in order in the multifunction display when the AdBlue® tank requires topping up:
Refill AdBlue See Owner’s ManualThe AdBlue® level has fallen below the reserve range. Top up AdBlue® immediately.
Top up AdBlue Emergency op. in XXX miles See Owner's ManualThe low AdBlue® level will lead to limited performance after the remaining distance displayed has been driven. Top up AdBlue® immediately.
XX,X l Top up AdBlue Emer. op.: max. XXX km/h Start not poss. in XXX km The low AdBlue® level will lead to limited performance from the speed displayed. After the remaining distance displayed has been covered, it will no longer be possible to start the engine. Top up with at least the amount of AdBlue® displayed.
XX,X l Top up AdBlue Switch on ignition, wait 60 sec. or eng. start not poss.The AdBlue® tank is empty. You can no longer start the engine. Top up with at least the amount of AdBlue® displayed. Switch on the ignition and wait for approximately 60 seconds. Start the engine.
You can see the AdBlue® range and level in the Service menu in the multifunction display.
The AdBlue® range shown depends strongly on the driving style and operating conditions. The actual range can therefore deviate from the calculated range.
Opening the AdBlue® filler cap
Press on the back area of fuel filler flap .
. Turn AdBlue® filler cap anti-clockwise and remove it.
anti-clockwise and remove it. You can also store the AdBlue® filler cap in the fuel filler cap holder in the fuel filler flap hinge arm.
Topping up AdBlue®
Screw on the fastener of AdBlue® refill canister .
. Screw disposable hose onto the opening of AdBlue® refill canister until hand-tight.
onto the opening of AdBlue® refill canister until hand-tight. Screw disposable hose onto the filler neck of the vehicle until hand-tight.
onto the filler neck of the vehicle until hand-tight. Lift up and tip AdBlue® refill canister .
. The filling process stops when the AdBlue® tank is completely full.
AdBlue® refill canister can be removed when it has been only partially emptied.
Unscrew and close disposable hose and AdBlue® refill canister in reverse order.
and AdBlue® refill canister in reverse order. Replace the AdBlue® filler cap and turn it clockwise.
Close the fuel filler flap.
Switch on the ignition for at least 60 seconds.
If the vehicle could not be started as the AdBlue® tank was empty, it can take up to 60 seconds for the refill to be detected.
Start the vehicle.
Avoid storing AdBlue® refill containers permanently in the vehicle.
Topping up the windscreen washer system
WARNING Danger of burns when opening the bonnet
If you open the engine bonnet when the engine has overheated or during a fire in the engine compartment, you could come into contact with hot gases or other escaping operating fluids.
Before opening the bonnet, allow the engine to cool down.
In the event of a fire in the engine compartment, keep the engine bonnet closed and call the fire service.
WARNING Risk of burns from hot component parts in the engine compartment
Certain component parts in the engine compartment can be very hot, e.g. the engine, the cooler and parts of the exhaust system.
Allow the engine to cool down and only touch component parts described in the following.
WARNING Risk of injury due to moving parts
Components in the engine compartment may continue running or start up suddenly, even if the ignition is switched off.
Make sure of the following before performing tasks in the engine compartment:
Switch the ignition off.
Never reach into the danger zone surrounding moving components, e.g. the rotation area of the fan.
Remove jewellery and watches.
Keep items of clothing and hair away from moving parts.
WARNING ‑ Risk of fire and injury due to windscreen washer concentrate
Windscreen washer concentrate is highly flammable. It could ignite if it comes into contact with hot engine component parts or the exhaust system.
Make sure that no windscreen washer concentrate spills out next to the filler opening.
Remove cap by the tab.
by the tab. Top up the washer fluid.
Replacing the windscreen wiper blades
WARNING Risk of becoming trapped if the windscreen wipers are switched on while wiper blades are being replaced
If the windscreen wipers begin to move while you are changing the wiper blades, you can be trapped by the wiper arm.
Always switch off the windscreen wipers and ignition before changing the wiper blades.
Moving the wiper arms into the replacement position
Switch the ignition on and switch off again immediately.
Within around 15 seconds, press and hold the 
button on the combination switch for approximately three seconds More.
button on the combination switch for approximately three seconds More. The wiper arms will move into the replacement position.
Replacing the windscreen wiper blades
Observe the information about the maintenance display.
Maintenance display
Remove protective film from the maintenance display on the tip of the newly fitted wiper blades.
from the maintenance display on the tip of the newly fitted wiper blades. When the colour of the maintenance display changes from black to yellow, the wiper blades should be replaced.
The duration until the colour changes varies depending on the usage conditions.
Checking the engine oil level using the oil dipstick
WARNING Danger of burns when opening the bonnet
If you open the engine bonnet when the engine has overheated or during a fire in the engine compartment, you could come into contact with hot gases or other escaping operating fluids.
Before opening the bonnet, allow the engine to cool down.
In the event of a fire in the engine compartment, keep the engine bonnet closed and call the fire service.
WARNING Risk of burns from hot component parts in the engine compartment
Certain component parts in the engine compartment can be very hot, e.g. the engine, the cooler and parts of the exhaust system.
Allow the engine to cool down and only touch component parts described in the following.
WARNING Risk of injury due to moving parts
Components in the engine compartment may continue running or start up suddenly, even if the ignition is switched off.
Make sure of the following before performing tasks in the engine compartment:
Switch the ignition off.
Never reach into the danger zone surrounding moving components, e.g. the rotation area of the fan.
Remove jewellery and watches.
Keep items of clothing and hair away from moving parts.
Requirements:
The engine has an oil dipstick. If not, the engine oil level can be checked only with the on-board computer More .
Depending on the engine, the oil dipstick may be installed in the engine compartment in different locations.
The waiting time before checking the oil level when the engine is at normal operating temperature is five minutes.
Park the vehicle on a level surface.
Pull oil dipstick out and wipe off.
out and wipe off. Slowly slide oil dipstick into the guide tube to the stop, and pull it out again after approximately three seconds.
into the guide tube to the stop, and pull it out again after approximately three seconds. oil level is correct: oil level is between
and . oil level too low: oil level is at
or below. oil level too high: oil level is above
.
If the oil level is too low, top up with 1 litre of engine oil.
If the oil level is too high, drain off excess engine oil. Consult a qualified specialist workshop.
Checking the engine oil level using the on-board computer
Requirements:
the engine has been warmed up.
the vehicle is parked on a level surface.
The engine is running at idle speed.
The engine oil level is determined during driving. Determining the engine oil level can take up to 30 minutes with a normal driving style and even longer with an active driving style.
You will see one of the following messages on the multifunction display:
Engine oil level Measuring now: measurement of the oil level is not yet possible.
Repeat the request after a maximum of 30 minutes' driving.
Engine oil level OK and the bar display for indicating the oil level on the multifunction display is green and is between "min" and "max": the oil level is correct.
Engine oil level Add 1.0 l and the bar display for indicating the oil level on the multifunction display is orange and is below "min":
Add 1 l of engine oil.
Reduce engine oil level and the bar display for indicating the oil level on the multifunction display is orange and is above "max":
Drain off any excess engine oil that has been added. To do so, consult a qualified specialist workshop.
For engine oil level turn on ignition
Switch on the ignition to check the engine oil level.
Engine oil level System inoperative: The oil level sensor is defective or not connected.
Consult a qualified specialist workshop.
Engine oil level System currently unavail.
Close the bonnet.
Information on washing the vehicle in a car wash
WARNING Risk of an accident due to reduced braking power after washing the vehicle
Braking efficiency is reduced after washing the vehicle.
After the vehicle has been washed, brake carefully while paying attention to the traffic conditions until braking power has been fully restored.
NOTE Damage from automatic braking
If one of the following functions is switched on, the vehicle brakes automatically in certain situations:
Active Brake Assist
Active Distance Assist DISTRONIC
HOLD function
Active Parking Assist
To avoid damage to the vehicle, deactivate these systems in the following or similar situations:
during towing
in a car wash
NOTE Damage due to unsuitable car wash
Before driving into a car wash make sure that the car wash is suitable for the vehicle dimensions.
Ensure there is sufficient ground clearance between the underbody and the guide rails of the car wash.
Ensure that the clearance width of the car wash, in particular the width of the guide rails, is sufficient.
To avoid damage to your vehicle when using a car wash, ensure the following beforehand:
Active Distance Assist DISTRONIC is deactivated.
The HOLD function is switched off.
the 360° Camera or the reversing camera is switched off.
the side windows and sliding sunroof are completely closed.
the blower for the ventilation/heating is switched off.
the windscreen wiper switch is in position
. the key is at a minimum distance of 3 m away from the vehicle. Otherwise the tailgate could open unintentionally.
in car washes with a conveyor system: neutral
is engaged.
In car washes with a conveyor system: if you leave the vehicle while it is being washed, make sure the key is located in the vehicle. The park position 
is otherwise automatically engaged.
If, after the car wash, you remove the wax from the windscreen and wiper rubbers, this will prevent smearing and reduce wiper noise.