Automatic Shift Strategy

1 - ABS control unit
2 - ABS sensors at wheels
3 - Speedometer
4 - Kickdown switch
5 - Digital Motor Electronics (DME) control unit
6 - Electronic transmission control unit
7 - Transverse acceleration sensor
8 - Selector lever system with two gates
9 - Cable
10 - Multi-function switch
11 - Automatic transmission
12 - Throttle with potentiometer
13 - Engine
14 - Stop light switch

The electronic transmission control unit is the information and command center of the entire system. It compares a multitude of information inputs (measurements) with stored driving and gearshift programs, selects the map that is suited best to the driving mode and sends commands to the transmission to execute or not to execute specific gearshifts.

A short-term function activated by the driver is also available to allow the shift points to be controlled electronically by the driver.

In addition to "standard" shift control, the following programs or special functions are built into the system:


Automatic program
a - Adaptive shift curve adaptation
b - Skip into sporting shift map
c - Upshift prevention
d - Slip monitoring
e - Warm-up map
f - Transmission protection at high ATF temperatures
g - Electronic kickdown latching
h - Downshifting during braking (ahead of curves)

Manual program
a - Automatic shifts in M program

Special functions
a - Shift comfort control (change of ignition timing)
b - Creep function (moving off in 2nd gear)
c - Emergency mode
d - Adaptive pressure control
e - Uphill and downhill detection