Mercedes-Benz Sprinter 2019 Operating Instructions Manual page 130

128 Driving and parking
Malfunctions in the DEF exhaust gas
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aftertreatment system
Avoid impurities in DEF.
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* NOTE DEF residue crystallizes after
some time. Remove DEF residue.
Immediately rinse surfaces that come in
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contact with DEF when filling with
water.
DEF can also be removed with a damp
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cloth and cold water.
If DEF has already crystallized, clean
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using a sponge and cold water.
DEF is a liquid urea solution used for exhaust gas
aftertreatment of diesel engines. In order for the
exhaust gas aftertreatment to function properly,
only use DEF in accordance with ISO 22241.
DEF has the following properties:
non-toxic
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colorless and odorless
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non-flammable
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DEF availability
you can have DEF refilled by fast service at a
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qualified specialist workshop, e.g. an author‐
ized Mercedes-Benz Center.
DEF is available at numerous gas stations via
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DEF filling pumps.
alternatively, DEF is available at qualified spe‐
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cialist workshops, e.g. an authorized
Mercedes-Benz Center, and at numerous gas
stations as a DEF refill canister or DEF refill
bottle.
% DEF freezes at a temperature of approx‐
imately 12.2 F (-11 °C). The vehicle is equip‐
ped with a DEF preheating system at the fac‐
tory. This means that winter operation is also
ensured for temperatures below 12.2 F
(-11 °C). If you top up DEF at temperatures
below 12.2 F (-11 °C), the DEF level in the
instrument cluster may not be displayed cor‐
rectly. If the DEF is frozen, drive for at least
20 minutes and then park the vehicle for a
minimum of 30 seconds, so that the level is
correctly displayed. In extreme winter condi‐
tions, the time needed to detect the top-up
amount may be considerably longer. Park the
vehicle in a warm garage to speed up this
process.
%
Ensure the connection between the refill con‐
tainer and vehicle filler neck does not drip.
Calling up the DEF range and DEF level gauge
On-board computer:
Service
,
Select DEF and confirm.
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The DEF fill level and the DEF range appear.
Instrument Display with color display
1
DEF range
2
DEF fill level
Instrument Display with black and white dis‐
play
1
DEF fill level
2
DEF range
Topping up DEF
* NOTE Engine damage due to DEF being
in the fuel
DEF must not be used to fill the fuel
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tank.
Only use DEF to fill the DEF tank.
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Do not overfill the DEF tank.
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* NOTE Contamination of the vehicle inte‐
rior due to DEF leakage
After topping up, carefully close the DEF
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refill container.