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:
Unlock the vehicle.
The following messages appear in order in the multifunction display when the AdBlue® tank requires refilling:
Refill AdBlue See Owner's Manual. The AdBlue® tank is down to the reserve level.
Refill AdBlue No start in XXX km . You can only drive the vehicle over the distance shown. Refill AdBlue® as soon as possible.
Refill AdBlue Start not possible. The vehicle can no longer be started.
You can see the AdBlue® range and level in the multifunction display More.
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 fuel filler flap 
.
. Turn AdBlue® filler cap 
anti-clockwise and remove it.
anti-clockwise and remove it. Preparing the AdBlue® refill canister
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. Topping up AdBlue®
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. Switch on the ignition for at least 60 seconds.
Start the vehicle.
Avoid storing AdBlue® refill containers permanently in the vehicle.