Mercedes-Benz C-CLASS Operator's Manual page 154

Automatic transmission
152
Upshifting (Mercedes-AMG vehicles)
!
The automatic transmission does not shift
up automatically even when the engine limit-
ing speed for the current gear is reached.
When the engine limiting speed is reached,
the fuel supply is cut to prevent the engine
from overrevving. Always make sure that the
engine speed does not reach the red area of
the tachometer. There is otherwise a risk of
engine damage.
Before the engine speed reaches the red area,
an upshift indicator will be shown in the multi-
function display.
Problems with the transmission
Problem
The transmission has
problems shifting gear.
The acceleration ability
is deteriorating.
The transmission no lon-
ger changes gear.
Transfer case
This section is only valid for vehicles with 4-
wheel drive (4MATIC). Power is always trans-
mitted to both axles.
!
Performance tests may only be carried out
on a 2-axle dynamometer. The brake system
Possible causes/consequences and M Solutions
The transmission is losing oil.
Have the transmission checked at a qualified specialist workshop
X
immediately.
The transmission is in emergency mode.
It is only possible to shift into second gear and reverse gear.
Stop the vehicle.
X
Shift the transmission to position P.
X
Switch off the engine.
X
Wait at least ten seconds before restarting the engine.
X
Shift the transmission to position D or R.
X
If D is selected, the transmission shifts into second gear; if R is
selected, the transmission shifts into reverse gear.
Have the transmission checked at a qualified specialist workshop
X
immediately.
When message : appears in the multifunc-
X
tion display, pull on the right-hand steering
wheel paddle shifter.
Kickdown
For maximum acceleration, depress the
X
accelerator pedal beyond the pressure point.
The automatic transmission shifts to a lower
gear depending on the engine speed.
Shift back up once the desired speed is
X
reached.
During kickdown, you cannot shift gears using
the steering wheel paddle shifters.
If you apply full throttle, the automatic trans-
mission shifts up to the next gear when the
maximum engine speed is reached. This pre-
vents the engine from overrevving.
Mercedes-AMG vehicles: kickdown is only
possible in the temporary setting.
or transfer case could otherwise be damaged.
Contact a qualified specialist workshop for a
performance test.