Owners Manual

If the ; check engine indicator lamp lights
up, the exhaust gas aftertreatment is faulty or
an emission-related malfunction has
occurred (Y page 197). You can then drive a
maximum of 50 mi (80 km) before the engine
management limits the number of remaining
engine starts.
If the exhaust gas aftertreatment is faulty,
have it checked and repaired at a qualified
specialist workshop.
You will find further information on DEF in the
"Service products" section (Y page 158).
Level indicator
You will find further information about DEF
consumption in the "Driving tips" section
(Y page 140).
Vehicles without steering wheel buttons
If the DEF reserve is less than 1.5 US gal
(5.5 l), the å indicator lamp lights up in
the instrument cluster and the message
¯DEF Chk appears in the display.
If the DEF reserve drops below the reserve
range of 0.8 US gal (3.0 l), the å indicator
lamp lights up in the instrument cluster and
the message ¯StArtS RExx appears in
the display. xx refers to the number of
remaining engine starts (from 16 to 0).
Vehicles with steering wheel buttons
If the DEF reserve is less than 1.5 US gal
(5.5 l), the message Check Diesel
Exhaust Fluid See Operator's Manual
appears in the display.
If the DEF reserve drops below the reserve
range of 0.8 US gal (3.0 l), the message
åxx starts remaining appears in the
display. xx refers to the number of remaining
engine starts (from 16 to 0).
ADR (working speed governor)
General notes
When activated, ADR automatically increases
the engine speed to a preset or adjustable
speed (Y page 119).
i
After a cold start, the idling speed of the
engine is increased automatically. If the
preset working speed is lower than the
increased idling speed, the working speed
is only reached once the engine has
completed the warm-up phase.
It is only possible to activate ADR with the
vehicle stationary and the parking brake
applied.
The selector lever must be in position P.
Activating/deactivating ADR
X
To activate: press upper section : of the
E switch while the engine is running.
The indicator lamp in the switch comes on.
Vehicles without steering wheel buttons:
The K indicator lamp in the instrument
cluster lights up.
Vehicles with steering wheel buttons:
The Operating speed governor
active message appears in the display.
X
To deactivate: press lower section ; of
the E switch while the engine is
running.
The indicator lamp in the switch goes out.
118
Driving the vehicle
Controls