126 Adaptive cruise control
Vehicles offset to one side
Applies to vehicles: with adaptive cruise control
Fig. 141 Vehicle traveling a head o utside the detect ion
range of t he rada r se nsor
Vehicles mov ing up ahead but offset i n the
la ne cannot be detected by ACC until they are
in sensor range.
Lane changes by other vehicles
Applies to vehicles: with adaptive cruise control
Fig. 142 A vehicle changes lanes
Vehicles that cut into your lane a sho rt dis
tance in front of you cannot be detected by
ACC until they are in senso r range.
Vehicles that are difficult to detect
Applies to vehicles: with adaptive cruis e contro l
Fig. 143 Two -wheeled vehicle driving ahead
Some vehicles moving up ahead in your lane
of trave l are difficult to detect, for examp le
two -wheeled veh icles, vehicles w ith high
ground clearance, loads sticking out the back .
Vehicles like this are often detected late or in
some situations not at all.
Stationary vehicles
Applies to vehicles: with adaptive cruise contro l
Fig. 144 Turning and stationary ve hicle
Fig. 145 Sheering out and stat ionary veh icle
If a vehicle that has been detected by ACC ex
its the highway or sheers out into the neigh
boring travel lane, and there is a stationary
vehicle ahead of that vehicle, ACC will not de·
tect or react to that stationary vehicle
<=> fig. 144 and c> fig. 145 .
Adaptive Air Suspension
Air suspension and damping
Description
App lies to vehicles: with Adapt ive Air S uspe nsio n
Air suspension and damping con be adjusted
separately.
Adaptive A ir Suspension is an electronically
controlled springing and damping system.
This chassis system makes it easier on the
driver by adapt ing to the particular situation
through imperceptible control processes.
The
Adaptive Air Suspension component reg
ulates ground clearance depending on vehicle
speed and driver input. It functions independ
ently from the load condition . Accelerating to
a speed above a predetermined limit will make the vehicle lower itself. On the other
hand, driving more slowly results in the vehi
cle raising again at specific speeds.
The
damping component provides individual
control of the damping forces . For example,
w ith damping characterist ics set to provide
greater comfort, damping is set somewhat
harder for a br ief per iod only as required, for
example, when go ing aro und a curve or when
braking.
Settings
Adapt ive Air Suspension prov ides the driver
with the opportun ity to set the chassis charac
ter istics also to their individual preference.
W ith the driving modes
Comfort, Automatic
and Dynamic the driver has three chassis set
tings available, ranging from comfort to spor
ty. The
Offrood mode can be selected for driv
ing on poor quality stretches of road. In addi
tion,
Lift provides a fifth mode, which can be
selected when exceptionally high ground
clearance is needed
c::;, page 155, Chassis con
trols .
The modes are set in MMI <::;,page 157.
Adaptive A ir Suspension 155
A WARNING
The height of the parked vehicle can
change due to temperature fluctuations or
changes in load .
@ Note
- Whenever you park your vehicle, a lways
make sure there is adequate clearance
above and below the vehicle. The he ight
of the parked vehicle can change as the
result of temperature fluctuations,
changes in load condition and changes in
the driving mode (ground clearance).
- If the vehicle is being transported (e.g .
by tow truck, train, ship, etc.), mount the
tie-down chains/cables over the running
surface (circumference) o f the tires. Nev
er secure the vehicle by the axle, the sus
pension struts or the front or rear tow
line eye . For technica l reasons, the pres
sure in the suspens ion struts may change
during the transport, which could result
in the vehicle no longer being secured
properly .
- If you are going to tow a trailer with a
trailer hitch that was
not installed ac
cording to factory specif ications, you
must activate the traile r operation mode
man ually
<::;,page 159.
(D Tips
-Before you can raise your vehicle using
the vehicle jack (for example, when
chang ing a flat tire) or a vehicle lift, yo u
must activate the jacking mode
c::;, page 159.
- On some models, the vehicle can reach
its maximum speed only in the
Automat
ic
and Dynamic modes.
Chassis controls
App lies to vehicles : wit h Adaptive A ir Suspensio n
Five different driving modes can be set by the
driver.
T he automatic control processes are speed
and t ime-dependent. For example, it is not
156 Adapti ve Air Susp en sion
possible to raise the suspension to a h igh level
above certain speeds .
When a speed of about 75 mph (120 km/h) is
exceeded for more than 30 seconds, the vehi
cle is automatically lowered to
low level when
in comfort and automatic mode. Ground
clearance is about 0.6 inch (15 mm) less,
compared to the
normal level .
When a speed of about 100 mph (160 km/h)
is exceeded for more than 20 seconds, the ve
h icle is automat ica lly lowered to
highway l ev
el
when in automatic and dynamic mode.
G round clearance is about 1.4 inches (35 mm)
less, compared to the
normal level. Road
hold ing is optimized as a result of the lower
center of gravity, and fuel consumption is re
duced as a result of reduced wind resistance .
I
Level adjustment
high level 2
high level 1
normal level
low level
highway level
Ground clearance
about 9.4 inches
(240 mm)
about
8 inches
(205 mm)
about 7 inches (180 mm)
about 6 .5 inches
(165 mm)
about 5 .7 inches
(145 mm)
The segment disp lay @ in the MMI Display
c:::> page 157 or in the instr ument cluste r dis
p lay
c:::> page 158 shows the current veh icle
level.
Automatic
Select the automatic mode if you prefer a bal
anced, comfortable suspension setting . The
damping characteristics are adjusted accord ingly.
- Automatic lowe rin g: When a speed of
about 75 mph (120 km/h) is exceeded for
more than 30 seconds, the vehicle is auto
matically lowered by about 0.6 inch (15
mm) to the
low level, wh ich is more suitable
for highway speeds . Road hold ing is opti
mized as a result of the lower ce nter of grav- ity and fuel consumption is reduced as a re
sult of r educed wind resistance . When a
speed of about 100 mph (160 km/h) is ex
ceeded for more than 20 seconds, the veh i
cle is automa tically lowered by an addi tional
0 .8 inch (20 mm) to
highway level .
-Automat ic raising: When the vehicle is at
highway level and the speed falls below
about 80 mph (130 km/h) for more than 20
seconds , the vehicle is automatically raised
to
low level. Th e vehicle is automatica lly
raised aga in to
normal level if the speed
fa lls below about 44 mph (70 km/h) for a
pe riod of 2 minutes . The vehicle is raised im
mediately when speed fa lls below about 22
mph (35 km/h) .
Dynamic
Select the dynam ic mode if yo u pre fer a spor
ty suspension se tti ng. In t his mode , the veh i
cle is lowered to
low level while it is still sta
t ionary and sporty damping characteristics
are selected . The warning light
Ill in the in
strument cluster will come on for a few sec
onds just to rem ind you of the reduced ground
clearance .
If you switch off the engine whi le the vehicle
is in the dynamic mode and then switch on the
igni tion once aga in, the
Ill warn ing light will
also come on again for a few seconds as a re minder .
-Automat ic lowe ring: When a speed of
about 100 mph (160 km/h) is exceeded for
more than 20 seconds , the veh icle is auto
mat ically lowered by 0 .8 inch (20 mm) to
highway level .
-Automa tic raising: The vehicle is automati
cally ra ised to
low level again , if the speed
fa lls below about 80 mph (130 km/h) for a
pe riod of 20 seconds. The ve hicle i s raised
immed iate ly when speed falls be low about
22 mph (35 km/h).
Comfort
Select the comfort mode if you desire a s us
pension setti ng w ith a special emp hasis on
comfort . Damp ing cha racte ris tics w ith a clear .,.
emphasis on comfort are selected in this
mode.
- Automatic lowering : When a speed of
abo ut 75 mph (120 km/h) is exceeded for
more than 30 seconds, the vehicle is auto
matically lowered by 0.6 inch (15 mm) to
low level .
-Automatic raising: The vehicle is automati
ca lly raised to
normal level again, if the
speed falls below about 44 mph (70 km/h)
for a period of 2 minutes . The vehicle is
raised immediately when speed falls below
about 22 mph (35 km/h) .
Offroad
Select the offroad mode when you have to
travel over poor quality sections of road (e .g.
trails). In th is mode, the vehicle is raised to
high level 1, and damp ing characteristics for
poor road stretches are selected . When
sw itch ing to offroad mode, the Adaptive Air
Suspension indicator appears automat ically in
the instrument cluster display ¢
page 158.
The offroad mode can only be activated at
speeds below 37 mph (60 km/h) . Offroad
mode ends automatically and the automatic
mode is activated when a speed of approxi
mately 50 mph (80 km/h) is exceeded.
Lift
Select the lift mode when except ionally high
ground clearance is needed at a reduced
speed. In this mode, the vehicle is raised to
high level 2. When switching to lift mode , the
Adaptive A ir Suspension indicator appears au
tomatically in the instrument cluster display
¢ page 158.
The lift mode can be activated only at speeds
be low 12 mph (20 km/h) . When a speed of
about 25 mph (40 km/h) is exceeded, the sys
tem automatically leaves lift mode and the
offroad mode is activated. The instrument
cluster display automat ically switches the dis
play to Adaptive Air Suspens ion to indicate re
duced ground clearance .
Adaptive Air Suspension 15 7
MMI settings
Applies to vehicles: wit h Adaptive A ir Suspension
Driving modes are adjusted in the MMI and
the current vehicle level is displayed .
Fig. 187 MMI Display: Sett ings
Fig. 188 MMI Display: Sett ings
Th e ign ition must be switched on to set the
driving modes.
1-Select: !CAR ! function button .
Raising and lowering
If the arrow (D ¢ fig. 187 is white or if the ar
rows
(D blink ¢ fig. 188, the vehicle is being
raised .
If the arrow @¢
fig. 187 is white or if the ar
rows
(D point downward and blink ¢ fig. 188,
the vehicle is being lowered .
The respective arrow stays on/blinks until the
level change is complete . The time used for a
level change can vary, depending on the cur
rent driving conditions .
Displaying the vehicle level
The c urrent vehicle level is shown with seg
ments filled out in the segment display@. If
only the bottom segment is filled o ut, the ve-
hicle is at highway level. If all segments are
IJJ>-
158 Adapti ve Air Suspens ion
fi lled out, the vehicle is at high level 2 and has
the greatest amount of ground clearance pos
sib le.
While the vehicle is being raised or lowered,
the target level is indicated by an arrow@
c::> fig. 187 or a white border @ c::> fig. 188 . The
arrow/border disappears aga in when the vehi
cle is at the target level.
Limitations to MMI s etting s
Please note that not eve ry dr iving mode can
be selected in every d riving situation . For ex
ample, it is not possible to switch to "lift"
mode at speeds above 12 mph (20 km/h) .
This mode is then shown
greyed out in the
MMI Display.
The vehicle can only be lowered when
all of
the vehicle's doors are closed. If one door is
open, all driving modes whose level sett ing is
belo w the current vehicle level appear
greyed
out
i n the MMI Display. If a door is opened
while the veh icle is being lowered, the lower
ing p rocess is interrupted u ntil all doors are
closed again .
If the system is temporar ily unava ilable due
to, for instance, an empty compressed air
tank, the driving modes that cannot be set ap pear
greyed out in the MM I Disp lay. As soon
as the system is available again, the driv ing
modes can once more be selected in the dis
p lay .
(D} Tips
- Fo r addition al in forma tion on the driv ing
modes
c:;> page 155, Chassis controls.
- When the compressed air tank is empty,
the compressor c an be switched on by
starting the engine . The Adaptive Air
Suspension is once again available, after
waiting a few minutes .
- To prevent over load, the system switches
off tempera rily if seve ral adj ustments
are made in a row. The Adaptive Air Sus
pension is once again available, after
waiting a few minutes. Appearance in the instrument cluster
display
Applies to veh
icles: w ith Adapt ive A ir Suspens ion
You can view th e current vehicle l evel in the
instrument cluster display.
Fi g. 1 89 Display: Adaptive Air Suspension
F ig . 190 Display: Adaptive Air Suspension
Repeated, brief tapping of the I RESET ! button
on the windshield wiper lever allows you to
se lect whether information concerning the
trip computer, digital tachometer, nav igat ion*
or "Adapt ive A ir Suspension" is to appear in
t h e instrument cluster d isp lay .
Display of the Adaptive A ir S uspension is auto
matic when the offroad or lift mode is select
ed, or when the vehicle is automatically low
ered in lift mode.
Rai sing and lowe ring
If arrow
(J) is white c::> fig. 189 or c::> fig . 190,
the vehicle is raised.
If arrow @is
white, the vehicle is lowered .
The respective arrow stays on until the level ch ange is complete. The time requ ired fo r a
level change can vary, depending on the cur-
ren t drivi ng conditions . ..,_
Displaying the vehicle level
The current vehicle leve l is shown with seg
ments fi lled out in the segment disp lay @. If
on ly the bottom segment is filled out, the ve
hicle is at highway leve l. If all segments are
fi lled out, the vehicle is at high level 2 and has
the greatest amount of ground clearance pos
sible.
While the vehicle is being raised or lowered,
the target level is indicated by an arrow @
¢
fig. 189 or a white border @¢ fig. 190. The
arrow/border disappears aga in when the vehi
cle is at the target level.
Jacking mode when changing a flat tire
Applies to vehicles: with Adaptive Air Suspension
This mode must be activated in the MMI be
fore raising the vehicle with a jack or on a ve
hicle lift.
.,. Select: ICARI funct ion button> ! SETUP I
function button > Jacking mode . Or
.,. Select:
I CARI funct ion button > Car sys
tems *
control button > Servicing & checks >
Air susp.: tire change .
The vehicle jack mode must be activated be
fore changing a wheel so that the automatic
control processes fo r the a ir suspension do
not make lift ing with the vehicle jack more dif
ficult.
The check lamp
II in the instrument cluster
d isplay illuminates in vehicle jack mode.
0) Tips
The vehicle jack mode is switched off auto
mat ically at speeds above 9 mph (15 km/
h).
Towing a trailer
Appl ies to vehicles: with towing hitch and Adaptive Air
Suspension
Automatic lowering is not desirable when
towing a trailer.
.,. Se lect: ICARI function button > !SETUP I
function button > Towing mode. Or
Adaptive A ir Suspension 159
.,. Select: I CAR I function button > Car sys
tems*
control button > Vehicle settings >
Air susp.: towing.
As long as towing mode is activated, a vehicle
with a trai ler appears in the
adaptive air sus
pens ion
main menu.
Level Adjustment when towing a trailer
- Before hit ching up the trailer and before ad
jus ting the tongue weight at the trailer, the
automatic or comfort mode
must be se lect
ed so that the ve hicle can be at normal level
¢ page 157, MMI settings.
-If driving in dynamic mode is desired, this
mode
must be selected before hitching up
the trailer and before adjusting the tongue
weight. However, note that your vehicle is lowered and ground clearance is reduced.
- If you have to dr ive under difficult road con
ditions, you can select offroad or lift mode,
after hitch ing up the trailer or after adjust
ing the tongue weight .
- If the veh icle is at
normal level, and you se
lect offroad mode wh ile traveling at speeds
higher than 22 mph (35 km/h), the veh icle
w ill not be ra ised. Offroad mode will appear
as the active mode in the MMI Display.
- If the veh icle is in offroad mode at
high level
1 ,
it automatically lowers to normal level
when the vehicl e is t ravel ing at speeds ex
ceeding approximately 31 mph (SO km/h).
The vehicle is automatical ly raised to
high
level 1
again when the traveling speed falls
be low approx imately 25 mph (40 km/h).
Restrictions when operating with a trailer
When operating w ith a trailer, the lift mode
can only be selected up to about 12 mph (20
km/h) . Lift mode is automatically cance led
again when a speed of about 25 mph (40 km/
h) is exceeded.
If t he vehicle is in automatic, comfort, offroad
or lift mode before the trai ler towing mode is
activated, the dynamic mode cannot be acti
vated .
If t he vehicle is in dynamic mode before tow-
ing operation is activated, it can be driven in
IJI,-
on a slope w ithout the veh icle tipping over
sideways (depends on center of gravity). Maxi m um permitted latera l ang le: 35°
Breakover angle
I ndicates the angle up to whi ch the veh icle
can drive ove r a ramp at low speed w it h out
the unde rside of the vehicle hitting the edge
of the ramp.
- Vehicl es with out air spring s: maximum
breakover ang le: 21, 1 °
- Vehicl es with adaptive air su sp ension* :
maximum b reakove r angle: 23.8° (at h igh
l evel 2)
Approach /d eparture angle
Transition from the horizontal p lane to a gra
d ient or from a grade bac k to level ground . In
d ic a tes the angle up to which the vehicle can
drive onto or off a slope at low speed wi thout
striking the bumper or the underbody.
- Vehicl es without air spring s: maximum ap
proach/depart ure angle: 21.0° (front),
23.4 ° (rear)
- Vehicl es with adaptiv e air su sp ension* :
maximum approach/departu re angle at high
l evel 2 : (front) 23,5°, (rear) 25 .4°
Ground clearance
The distance between the road surface and
the lowest po int of the ve hicle underbody .
-Vehicles w ithout air spring s: ground clear
ance: 8 .1 in (204.8 mm)
- Vehicles w ith adapti ve air suspension *:
maximum ground clearance: 9 .4 i n
(239 .8 mm) at high level 2
A WARNING
Exceeding the stated maximum figures
can result in severe injuries or ve hicle dam
age.
- All the information was gathered on lev
el, firm and non-slippery road surfaces,
and unde r dry wea ther conditions.
- Ideal conditions do not p revail offroad.
Never utilize the maximum read ings to
Driving off road 239
their f ullest, always leave a safety re
serve.
Driving tips
On poor road and offroad, there is always on
ly one motto: Plan ahead and drive slowly!
Please obse rve the fo ll ow ing when d riving
away from paved roads :
.,. Drive on ly on roads and offroad sections
which ma tch the design of yo ur vehicle and
your abilities as a driver. Never take r isks!
.,. Drive slow ly and plan ahead!
.,. Take into consideration the
ground clear
an ce
of your vehicle .
.,. Act ivate the
ESC off road mode q page 225
as needed.
.,. Use the
hill descent control q page 226
when dr iv ing down steep sections on h ills .
Unpa ved ro ads and offroad
Drive slowly on unfamiliar roads and unknown
offroad section s, and look out for unexpected
obstacles (e .g. po tholes, rocks, tree s tumps,
etc .) .
To prevent the vehicle from bottoming and
avo id damage to the underbody, you should
drive straight across severe bumps in the
ground with only one side of the veh icle so
that only two of your whee ls cross the bumps .
Drive b risk ly through sandy or marshy offroad
sec tions and do not stop, i f at all possible .
Driving throu gh wate r
Note the following to avoid vehicle damage
when d riving through water, for examp le on
flooded roads:
- The wa ter must not be any higher than the
bottom of the vehicle body .
- Do not dr ive faste r tha n walk ing speed .
Driving on a slope
If you ever find yourself not able to climb a
s lope, do not try to turn around , drive back
down in
r e ver se . Otherwise, you run the r isk
of tipp ing ove r. ..,.
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