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  • V-Class
  • 06/2020
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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.
NOTE Overfilling the AdBlue® tank due to the vehicle standing at an angle

The AdBlue® tank can only be filled as intended when the vehicle is parked on a level surface. This way, variations in the filling amount are avoided.

When filling the reservoir when the vehicle is standing at an angle, there is a risk of overfilling. This may damage exhaust gas aftertreatment components.

The vehicle must be parked on a level surface to fill the AdBlue® tank.
NOTE Paintwork damage due to AdBlue®

AdBlue® residue crystallises after some time.

When filling with AdBlue®, use water to immediately rinse surfaces that come in contact with it.
AdBlue® can also be removed with a damp cloth and cold water.
If AdBlue® has already crystallised, clean using a sponge and cold water.
Requirements
  • the auxiliary heating is switched off

  • the ignition is switched off

  • the front left-hand door is open

The following messages that appear in succession in the multifunction display indicate that you need to refill the AdBlue® tank:
  • Refill AdBlue See Owner's Manual

    The AdBlue® tank has dropped to the reserve level.

  • Refill AdBlue Emer. oper. in XXX km  See Owner's Manual

    The low AdBlue® level will result in limited performance after the remaining distance displayed has been driven. Top up AdBlue® as quickly as possible.

  • Emergency operation: 20 km/h No start in XXX km See Operating Instructions

    The vehicle speed is limited to approximately 20 km/h. You will only be able to drive the vehicle the distance shown. Subsequently, it will no longer be possible to start the engine.

  • Refill AdBlue Engine start not possible

    The vehicle can no longer be started.

You can also have the AdBlue® fill level and the AdBlue® range displayed More.

Opening the AdBlue® filler cap
Open the front left-hand door and lift up filler cap .
Close all vehicle doors to prevent ammonia vapours from entering the vehicle interior.
Turn blue AdBlue® filler cap anti-clockwise and remove it.

Fuel filler cap for the fuel remains closed.

Filling procedure with the pump nozzle of an AdBlue® filling pump
Insert the pump nozzle into the filler neck and top up with AdBlue®. When doing so, do not overfill the AdBlue® tank.
If the pump nozzle automatically switches off during refilling, do not continue the filling procedure.

The AdBlue® tank is completely full.

Refuelling with a refill canister
Variant 1
Variant 2
Unscrew the cap on AdBlue® refill canister .
Screw disposable hose onto the opening of AdBlue® refill canister until hand-tight.
Screw disposable hose 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.

Avoid storing AdBlue® containers permanently in the vehicle.

Unscrew disposable hose and close AdBlue® and refill canister in reverse order.
Closing the AdBlue® filler cap
After filling the AdBlue® tank, place AdBlue® filler cap on the filler neck and tighten it clockwise.
Turn the AdBlue® filler cap until the lettering is legible and horizontal.

The filler neck is only locked correctly when this is the case.

Open the front left-hand door first, and then close the filler flap.
Switch on the ignition.

The Refill AdBlue See Owner's Manual message in the multifunction display must go out after approx. 20 seconds. If the message continues to be displayed, you must add more AdBlue®.