Purity
Assuring the purity of DEF is particularly important with respect to avoiding malfunctions in the exhaust gas aftertreatment system.
If DEF is pumped out of the DEF tank, e.g. during repair work, it must not be returned to the tank. The purity of the fluid can no longer be guaranteed.
Impurities in DEF (e.g. due to other
service products, cleaning agents or dust)
lead to:
• increased emission values
• damage to the catalytic converter
• engine damage
• malfunctions in the BlueTEC exhaust gas aftertreatment system
See also:
Roadside Assistance button
•► Press and hold Roadside Assistance
button 1 for more than two seconds.
This initiates a call to the Mercedes-Benz
Customer Assistance Center. The indicator
lamp in Roadside Assistanc ...
Adding engine oil
WARNING
If engine oil comes into contact with hot
engine parts, it may ignite and you could burn
yourself. Do not spill any engine oil on hot
engine parts.
Environmental note
When adding oi ...
Storing a destination permanently in
the destination memory
Proceed as described in the "From the list
of previous destinations" section. ...