2008 MERCEDES-BENZ GL320 cruise control

268 Controls in detail
Driving systems
Adjustment in 5 mph
(Canada: 10 km/h) increments
Briefly press the cruise control lever
down past the resistance point in direc-
tion of arrow2 (
page 265).
Release the cruise control lever.
The vehicle set speed decreases in
increments of 5 mph
(Canada: 10 km/h).Setting to last stored speed
(“Resume” function)
Briefly pull the cruise control lever in
direction of arrow4 (
page 265).
The Distronic resumes to the last set
speed.
Remove your foot from the accelerator
pedal.
The last set speed or, if no speed is stored,
the current set speed appears in the
multifunction display for approximately
5 seconds.Deactivating Distronic
There are several ways to deactivate the
Distronic system:
Step on the brake pedal.
or
Briefly tip the cruise control lever in
direction of arrow3 (
page 265).
Distronic will be deactivated. The last set
speed will be stored in memory.
iThe set speed value is decreased in 5 mph
(Canada: 10 km/h) increments each time you
press the cruise control lever down past the
resistance point.
iThe new speed is set and the vehicle will
decelerate. Keep in mind that it may take a brief
moment until the vehicle has reached the set
speed.
Warning!G
The set speed stored in memory should only
be set again if prevailing road conditions
permit. Possible acceleration or decelera-
tion differences arising from returning to the
preset speed could cause an accident
and/or serious injury to you and others.
iThe following message appears in the multi-
function display for approximately 5 seconds:
DISTRONIC Off.
The last stored set speed is deleted when the
engine is turned off.
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269 Controls in detail
Driving systems
Setting the following distance in
Distronic
You can set the specified following
distance for Distronic by varying the time
setting between 1.0 and 2.0 seconds. Us-
ing this time setting and the current speed
of your vehicle, Distronic calculates and
sets the required following distance to the
preceding vehicle. The set distance will be
shown in the multifunction display
(
page 265).
The distance setting switch for the time
setting is located on the cruise control le-
ver on the left-hand side of the steering
column.
iThe Distronic switches off automatically
when

you step on the brake pedal

you depress the parking brake pedal
In this case, the Distronic speed segments in the
speedometer (
page 263) will go out.

the vehicle speed falls below 20 mph
(30 km/h)

the ESP® is in operation

the ESP® is switched off with the ESP®
switch (
page 105)

the ESP® has switched off due to a
malfunction (
page 441)

you set the automatic transmission toN
while driving
The Distronic speed segments in the
speedometer (
page 263) will go out and an
acoustic warning will sound.
Warning!G
Distronic switches off and releases the
brakes when the vehicle decelerates below
the minimum speed of 20 mph (30 km/h)
by operation of the system. At that time the
driver must apply the brakes in order to
reduce vehicle speed further or bring it to a
stop.
!Setting the automatic transmission toN
while driving cancels the Distronic. However, the
automatic transmission should not be set toN
while driving except to coast when the vehicle is
in danger of skidding (e.g. on icy roads).
iDepressing the accelerator pedal does not
deactivate the Distronic. After a brief accelera-
tion (e.g. for passing), the Distronic will resume
the last set speed.
Warning!G
It is up to the driver to exercise discretion to
select the appropriate setting given road
conditions, traffic, driver’s preferred driving
style and applicable laws and driving recom-
mendations for safe following distance.
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274 Controls in detail
Driving systems
Switching the Downhill Speed
Regulation on/off
The switch is located on the upper part of
the center console.
Vehicles without enhanced off-road
package*
1DSR on/off
2Indicator lamp
Vehicles with enhanced off-road package*
1DSR on/off
2Indicator lamp
iWhenever DSR is switched on, DSR will use
the programmed default speed to regulate the
vehicle’s speed. The default speed programmed
at the factory is 4 mph (Canada: 6 km / h). The
default speed can be reprogrammed using the
control system (
page 183). The next time DSR
is switched on, DSR will use the newly pro-
grammed default speed to regulate the vehicle’s
speed.
Once DSR is switched on, you can adjust the set
speed using the cruise control lever
(
page 265). Keep in mind that adjusting the
set speed using the cruise control lever with DSR
switched on will not change the programmed
default speed. If DSR is switched off and then
switched on again, DSR will use the programmed
default speed.
Depending on the road surface and level of
downhill grade, the DSR may not be able to
maintain the set speed. To maintain the set
speed, apply the brakes if necessary.
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276 Controls in detail
Driving systems
Adjusting Downhill Speed Regulation
speed with DSR switched on
With the DSR switched on (
page 274),
the speed setting can be changed using
the cruise control lever.
The cruise control lever is the uppermost
lever on the left-hand side of the steering
column.
Cruise control lever
1Increase set speed
2Reduce set speed
You can change the set speed between
3 - 10 mph (Canada: 4 - 18 km/h).You can increase or reduce the set speed
in two ways.
Adjustment in 1 mph (Canada: 1 km/h)
increments
Increase set speed:
Briefly lift the cruise control lever up to
the resistance point in direction of
arrow1 (
page 276).
Release the cruise control lever.
The vehicle speed increases in incre-
ments of 1 mph (Canada: 1 km/h).Reduce set speed:
Briefly press the cruise control lever
down to the resistance point in direc-
tion of arrow2 (
page 276).
Release the cruise control lever.
The vehicle speed decreases in incre-
ments of 1 mph (Canada: 1 km/h).
Each time the set speed is changed,
DSR will appear in the multifunction dis-
play and the changed set speed is
shown.
iThe set value is increased or decreased in
1 mph (Canada: 1 km/h) increments each time
you lift or depress the cruise control lever to the
resistance point.
iThe set speed is canceled when DSR is
switched off. If DSR is switched on again, DSR
will use the programmed default speed
(
page 183).
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277 Controls in detail
Driving systems
Adjustment in 5 mph
(Canada: 10 km/h) increments
Increase set speed:
Briefly lift the cruise control lever up
past the resistance point in direction of
arrow1 (
page 276).
Release the cruise control lever.
The vehicle speed increases in incre-
ments of 5 mph (Canada: 10 km/h).
Reduce set speed:
Briefly press the cruise control lever
down past the resistance point in direc-
tion of arrow2 (
page 276).
Release the cruise control lever.
The vehicle speed decreases in incre-
ments of 5 mph (Canada: 10 km/h).
Each time the set speed is changed,
DSR will appear in the multifunction dis-
play and the newly set speed is shown.Off-road driving program (Vehicles
without enhanced off-road package*)
The off-road driving program is designed to
assist the driver when driving off-road in
terrain and crossing water. The off-road
driving program adjusts the engine power
and shifting of the automatic transmission
to be more suitable for the off-road use of
the vehicle. In addition, the ABS, ESP
®, and
4-ETS designed for off-road use are
automatically activated.
In the following situations you should
switch to the off-road driving program:

during off-road driving

when crossing water (page 360)

when towing up or down on steep
gradients
iThe set value is increased or decreased in
5 mph (Canada: 10 km/h) increments each time
you lift or depress the cruise control lever past
the resistance point.
iThe new speed is set and the vehicle will
accelerate or decelerate. Keep in mind that it
may take a brief moment until the vehicle has
reached the new set speed.
iThe set speed is canceled when DSR is
switched off. If DSR is switched on again, DSR
will use the programmed default speed
(
page 183).
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353 Operation
Driving instructions
Tire speed rating
Regardless of the tire speed rating, local
speed limits should be obeyed. Use
prudent driving speeds appropriate to pre-
vailing conditions.
An electronic speed limiter prevents your
vehicle from exceeding a speed of
130 mph (210 km/h).The factory equipped tires on your vehicle
may have a tire speed rating above the
maximum speed permitted by the
electronic speed limiter.
Make sure your tires have the required tire
speed rating as specified for your vehicle in
the “Technical data” section (
page 555),
for example when purchasing new tires.
For information on how to identify the tire
speed rating on a tire’s sidewall, see “Tire
size designation, load and speed rating”
(
page 406).
If you are uncertain about the correct
reading of the information given on a tire’s
sidewall, any authorized Mercedes-Benz
Light Truck Center will be glad to assist
you.
Winter driving instructions
The most important rule for slippery or icy
roads is to drive sensibly and to avoid
abrupt acceleration, braking and steering
maneuvers. Do not use the cruise control
system under such conditions.
When the vehicle is in danger of skidding,
shift the automatic transmission to
positionN. Try to keep the vehicle under
control by corrective steering action.
Warning!G
Even when permitted by law, never operate
a vehicle at speeds greater than the maxi-
mum speed rating of the tires.
Exceeding the maximum speed for which
tires are rated can lead to sudden tire
failure, causing loss of vehicle control and
possibly resulting in an accident and/or
serious injury and possible death, for you
and for others.
iFor information on speed ratings for winter
tires, see “Winter tires” (
page 420).
For additional general information on tire speed
markings on the tire sidewall, see “Tire speed
rating” (
page 418).
iFor information on driving with snow chains,
see “Snow chains” (
page 421).
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452 Practical hints
What to do if …
Display messagePossible cause/consequencePossible solution
ABSUnavailable
See Operator’s ManualThe self-diagnosis has not yet been
completed yet.The display will clear after driving a
short distance at a vehicle speed of
above 12 mph (20 km/h).
Cruise Control And
SPEEDTRONICInoperativeThe cruise control is malfunctioning.Have cruise control checked by an
authorized Mercedes-Benz Light
Truck Center.
Cruise Control––– MPHYou have attempted to set a speed
while driving below 20 mph
(30 km/h).Accelerate to a speed exceeding
20 mph (30 km/h) and set the
speed (
page 255).
The ESP® is switched off.Switch on the ESP® (page 103).
The automatic transmission is set to
positionP, R, orN.Set the automatic transmission to
positionD (
page 191).
The vehicle is secured with the
parking brake.Release the parking brake
(
page 59).
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575 Index
Corner-illuminating front fog lamps* 147
Messages in the multifunction
display 478
Replacing bulbs 510
Crossbars* 295
Crossing obstacles 361
Cruise control 255
Activating 257
Messages in the multifunction
display 452
Cup holders 320
Cleaning 321
Front center console 321
Front center console,
Removing/Installing 321
Rear armrest 320
Curb weight 416
D
Date display, Setting 174
Daytime running lamp mode 145
Setting 175
Deep water see Standing water
Defogging windshield 221, 235
Defrosting, Front 221, 235
Defrosting, Rear 212Delayed shut-off
Exterior lamps 176
Interior lighting 177
Department of Transportation see DOT
Diesel engine
Preglow indicator lamp 29
Differential locks* 204
A few words about 204
Messages in the multifunction
display 488
Switching 205
Difficulties
While driving 65
While starting 59
Digital clock see Clock
Digital speedometer 155, 163
Dimensions, Vehicle 560
Direction of rotation (tires) 387
Displays
Digital speedometer 155, 163
Distronic* 263
Maintenance service indicator 422
Messages in the multifunction
display 449
Multifunction display 155Outside temperature 155, 163
Selecting 173
Symbol messages 466
Text messages 451
Vehicle status message 168, 449
Vehicle system settings, Control
system 159, 161, 168
Distance to empty (range), Trip
Computer 184
Distronic* 260
Activating 266
Cleaning system sensor 430
Control system 264
Deactivating 268
Distance warning function* 272
Distance warning function*
activating/deactivating 183
Driving hints 270
Messages in the multifunction
display 453
Sensor cover 430
Warning and indicator lamps 263
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