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In manual program mode M, upshift
indicator ; in the multifunction display
advises you to upshift before the engine
reaches the overspeed range. Thus you can
drive at the maximum engine speed for each
gear without overrevving the engine.
X
Shift the automatic transmission from
current gear : into the next higher gear.
The fuel supply will otherwise be
interrupted to prevent the engine from
overrevving.
Downshifting
G
Warning!
On slippery road surfaces, never downshift in
order to obtain braking action. This could
result in drive wheel slip and reduced vehicle
control. Your vehicle’s ABS will not prevent
this type of loss of control.
X
Briefly pull left gearshift control :
(Y page 323).
The automatic transmission shifts into the
next lower gear.
i
For maximum acceleration, pull and hold
the left gearshift control. Depending on the
engine speed the automatic transmission
selects the optimal gear for maximum
acceleration.
i
When you brake or stop, the automatic
transmission shifts down into a gear from
which you can easily accelerate or take off.
Kickdown
Using the kickdown while driving in manual
program mode M is not possible.
Deactivating manual shift program
X
Press the program mode selector switch
repeatedly until C or S appears in the
multifunction display.
or
X
Restart the engine.
The automatic transmission will go to
automatic program mode C.
Manual program mode M is not stored.
Emergency operation (limp-home
mode)
If vehicle acceleration becomes less
responsive or sluggish or the automatic
transmission no longer shifts, the automatic
transmission is most likely operating in limp-
home (emergency operation) mode. In this
mode only second gear and reverse gear R
can be selected.
X
Stop the vehicle in a safe location.
X
Shift the automatic transmission into park
position P.
X
Turn off the engine.
X
Wait at least 10 seconds before restarting.
X
Restart the engine.
X
Shift the automatic transmission into drive
position D (for second gear) or reverse gear
R.
X
Have the automatic transmission checked
at an authorized Mercedes-Benz Center as
soon as possible.
Transfer case
This section applies to vehicles equipped with
all-wheel drive (4MATIC) only. Both the front
and rear axles are powered at all times when
the vehicle is being operated.
!
Only conduct operational or performance
tests on a two-axle dynamometer. If such
tests are necessary, contact an authorized
Mercedes-Benz Center. You could
Transfer case
325
Controls in detail
221_AKB; 6; 20, en-US
d2ugruen, Version: 2.11.8.1
2009-09-24T13:28:17+02:00 - Seite 325
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