5 Speed Automatic Transmission
Details & Technology
The fully automated electrohydraulic 5-speed transmission transfers power to the wheels
via a torque converter with integrated lockup clutch. The lockup clutch
minimizes power
s or slip across the torque converter and can engage in all gears, depending on engine
speed and load. This system allows upshifts to be performed smoothly and almost
instantaneously.
P activates a parking lock. Selector lever position P is the only
position in which the ignition key can be released. The selector lever can only be moved
out of position
P when the brake pedal is depressed and the ignition switched on.
In selector lever position
D, the vehicle always moves off in 1st gear, and the
transmission control unit subsequently selects the most appropriate gears automatically
based on engine speed and road speed. Upwards of approx. 6 km/h
(3.7mph), it is not
D to R.
When the transmission is in automatic
mode (D), it is possible to the shift range by
nudging the selector lever towards
- or +.
Each time the selector lever is nudged from position
D towards -, the shift range is
reduced by one gear, conditions permitting. To prevent excessive engine speeds
and
maintain the power flow, downshift requests which would cause the engine to overrev are
not carried out. If the selector lever is pressed towards
- and held, the transmission
changes down by several gears, conditions permitting.
©2015 Mercedes-Benz USA, LLC / Daimler Vans USA, LLC
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