Page 245 of 521

244 Controls in detailDriving systems1Set current or higher speed
2Set current or lower speed
3Cancel cruise control
4Resume at last set speedSetting current speed
Accelerate or decelerate to the desired
speed.
Briefly lift1 or depress2 the cruise
control lever.
The current speed is set.
Remove your foot from the accelerator
pedal.
Cruise control is activated.
The selected speed appears in the multi-
function display for approximately
5 seconds, and the corresponding speed-
ometer segments from the selected speed
to the vehicle maximum speed are illumi-
nated.
Warning!
G
The cruise control brakes automatically so
that the set speed is not exceeded.
Keep in mind that the cruise control is a
convenience system designed to assist the
driver during vehicle operation. The driver is
and must remain at all times responsible for
the vehicle speed and for safe brake
operation.
iOn uphill or downhill grades, the cruise
control may not be able to maintain the
set speed. Once the grade eases, the
set speed will be resumed.
On downhill grades, the cruise control
maintains the set speed with active
braking action.
In addition, on longer downhill grades
the automatic transmission will auto-
matically downshift.
Page 246 of 521

245 Controls in detail
Driving systems
Canceling cruise control
There are several ways to cancel the cruise
control:
Step on the brake pedal.
The cruise control is canceled. The last
speed set is stored for later use.
or
Briefly push the cruise control lever in
direction of arrow3 (
page 244).
The cruise control is canceled. The last
speed set is stored for later use.
iThe last stored speed is canceled when
you turn off the engine.
iThe cruise control switches off auto-
matically if
you step on the brake pedal.
you depress the parking brake
pedal.
In this case the segments in the
multifunction display (
page 249)
go out and no warning sounds.
the vehicle speed is below 20 mph
(30 km/h).
the ESP
® is in operation or
switched off with the ESP
® switch
(
page 96).
you move the gear selector lever to
position N while driving.
The segments in the multifunction dis-
play (page 249) go out, and an
acoustic warning sounds.
!Moving gear selector lever to
positionN while driving also cancels
the cruise control. However, the gear
selector lever should not be moved to
positionN while driving except to coast
when the vehicle is in danger of skid-
ding (e.g. on icy roads).iDepressing the accelerator pedal does
not deactivate the cruise control. After
brief acceleration (e.g. for passing), the
cruise control will resume the last
speed set.
Page 247 of 521

246 Controls in detailDriving systemsSetting a higher speed
Lift cruise control lever in direction of
arrow1 (
page 244) and hold it up
until the desired speed is reached.
Release the cruise control lever.
The new speed is set.
Setting a lower speed
Depress the cruise control lever in di-
rection of arrow2 (
page 244) and
hold it down until the desired speed is
reached.
Release cruise control lever.
The new speed is set.Fine adjustment in 1 mph
(Canada: 1 km/h) increments
Faster
Briefly tip the cruise control lever in di-
rection of arrow1 (
page 244).
Slower
Briefly tip the cruise control lever in di-
rection of arrow2 (
page 244).Setting to last stored speed
(“Resume” function)
Briefly pull the cruise control lever in di-
rection of arrow4 (
page 244).
The cruise control resumes the last set
speed.
Remove your foot from the accelerator
pedal.
The selected speed appears in the multi-
function display for approximately
5 seconds, and the corresponding speed-
ometer segments from the selected speed
to the vehicle maximum speed are illumi-
nated.
iWhen you use the cruise control lever
to decelerate, the brake system will au-
tomatically brake the vehicle if the en-
gine’s braking power does not brake
the vehicle sufficiently.
Warning!
G
The speed stored in memory should only be
set again if prevailing road conditions per-
mit. Possible acceleration or deceleration
differences arising from returning to the pre-
set speed could cause an accident and/or
serious injury to you and others.
Page 250 of 521

249 Controls in detail
Driving systems
Distronic displays in the speedometer
dial
1Set speed
If Distronic is activated, one or two seg-
ments come on around the set speed.
Warning!
G
Close attention to road and traffic condi-
tions is imperative at all times, regardless of
whether or not Distronic is activated.
Use of Distronic can be dangerous on wind-
ing roads or in heavy traffic because condi-
tions do not allow safe driving at a steady
speed.
Distronic will not react to stationary objects
in the roadway (e.g. a stopped vehicle in a
traffic jam or a disabled vehicle). Distronic
will also not respond to oncoming vehicles.
Switch off Distronic:
when changing from the left to the right
lane if vehicles are moving more slowly
in the left lane
when entering a turn lane or highway off
ramp
in complex driving situations, such as in
highway construction zones
In these situations, Distronic will continue to
maintain the set speed unless deactivated.
Distronic is designed and intended only to
maintain a set speed and keep a set dis-
tance from moving objects in front of it.Warning!
G
The “Resume” function should only be oper-
ated if the driver is fully aware of the previ-
ously set speed and wishes to resume this
particular preset speed.
iThe vehicle speed displayed on the
speedometer can briefly vary from the
speed setting on the Distronic system.
Page 252 of 521
251 Controls in detail
Driving systems
Distronic menu in the control system
In the Distronic menu you can read the cur-
rent settings for Distronic. What appears in
the multifunction display depends on
whether Distronic and the distance warn-
ing function are turned on or off.
Press buttonè orÿ repeatedly
until you see one of the following dis-
plays.Distronic deactivated
When Distronic is deactivated you will see
the standard display of Distronic in the
multifunction display.
1Vehicle ahead, if detected
2Actual distance to vehicle ahead
3Preset distance threshold to vehicle
ahead
4Your vehicle
5Symbol for activated distance warning
function
Warning!
G
Distronic brakes your vehicle with a maxi-
mum deceleration of 6.5 ft / s
2 (2 m / s
2).
This corresponds to about 20% of the maxi-
mum deceleration ability of your vehicle.
Distronic brakes the vehicle in an effort to
restore the preset distance or to maintain
the speed.
Page 253 of 521

252 Controls in detailDriving systemsDistronic activated
If you turn Distronic on, you will see the set
speed in the multifunction display for
about 5 seconds. When Distronic is
activated, you will see the following display
in the multifunction display.
1Distronic activatedCruise control lever
The Distronic system is operated by means
of the cruise control lever.
The cruise control lever is the uppermost
lever on the left-hand side of the steering
column.
1Set current or higher speed
2Set current or lower speed
3Deactivate Distronic
4Resume at last set speedActivating Distronic
You can activate Distronic if
you are driving between 20 mph
(30km/h) and 110mph (180km/h)
the ESP
® is activated (
page 94)
If Distronic has not been activated after
pressing the cruise control lever you will
see the message
---
in the multifunction
display.
In the following cases you cannot activate
Distronic
up to 2 minutes after starting the en-
gine
when you brake
if you have set the parking brake
if the gear selector lever is in
positionP, R or N
if the ESP
® is switched off
Page 254 of 521

253 Controls in detail
Driving systems
Setting the current speed
Accelerate or decelerate to the desired
speed.
Briefly lift or depress the cruise control
lever.
The current speed is set.
Remove your foot from the accelerator
pedal.Setting a higher speed
Briefly tip the cruise control lever in di-
rection of arrow1 (
page 252) to in-
crease vehicle speed in increments of
5 mph (Canada: 10 km/h).
The new speed is set.
The stored speed is displayed in the
multifunction display for approximately
5 seconds (
page 252), and one or
two segments around the stored speed
come on in the speedometer
(
page 249).Setting a lower speed
Briefly tip the cruise control lever in di-
rection of arrow2 (
page 252) to de-
crease vehicle speed in increments of
5 mph (Canada: 10 km/h).
The new speed is set.
The stored speed is displayed in the
multifunction display for approximately
5 seconds (
page 252), and one or
two segments around the stored speed
come on in the speedometer
(
page 249).
iIf you do not take your foot off the
accelerator completely, the following
message will appear in the multifunc-
tion display: Distronic
overrideThe distance to a slower moving vehi-
cles in front of you will not be set. Your
vehicle speed will then be determined
only by the accelerator pedal position.
iDepressing the accelerator pedal does
not deactivate Distronic. After brief ac-
celeration (e.g. for passing), the cruise
control will resume the last speed set.
iWhen you use the cruise control lever
to decelerate, the brakes will be ap-
plied to support deceleration.
In addition, the transmission will auto-
matically downshift on long downhill
grades.
Page 255 of 521

254 Controls in detailDriving systemsFine adjustment in 1 mph
(Canada: 1 km/h) increments
Faster
Briefly tip the cruise control lever in di-
rection of arrow4 (
page 252).Setting to last stored speed
(“Resume” function)
Briefly tip the cruise control lever in di-
rection of arrow4 (
page 252).
Distronic is activated and set to the last
stored speed.
Remove your foot from the accelerator
pedal.Deactivating Distronic
There are several ways to deactivate the
Distronic system:
Briefly tip the cruise control lever in di-
rection of arrow3 (
page 252).
or
Step on the brake pedal.
Distronic will be deactivated. The last
speed set will be stored into memory.
Warning!
G
The speed stored in memory should only be
set again if prevailing road conditions per-
mit. Possible acceleration or deceleration
differences arising from returning to the pre-
set speed could cause an accident and/or
serious injury to you and others.
iThe following message will appear in
the multifunction display for approxi-
mately 5 seconds:Distronic offThe last stored speed is deleted when
you turn off the engine.