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Home >> BMW >> 2012 >> 335xi Automatic Trans >> Repair and Diagnosis (Single Page) >> Transmission >> Transmission Control Systems >> Transmission & Driveline System - Functional Description - E92 >> Transmission & Driveline Systems - Functional Description >> Gear Selector Switch >> Brief description of components >> Selector lever

Selector lever

The function display is integrated in the selector lever. Independently of the selector-lever position, the engaged drive position is displayed in the function display.

Fig 1: Identifying Selector Lever Position
G09871820Courtesy of BMW OF NORTH AMERICA, INC.
Index Explanation
1 Selector lever
2 P button (parking)
3 Function display with gearshift diagram
4 SPORT button (EDC button)
5 Unlock button

The selector lever can be used to select the following positions:

P for parking

Function "P" is to be set by operating a separate button on the gear selector switch.

R for reverse gear

N for Neutral

D for Drive = automatic mode

M/S "M" for manual operation = Steptronic; "S" for Sport program = automatic mode with sporting characteristic curves

An interlock prevents inadvertent shifts to position "R". To cancel the interlock, the brake must be operated by pressing the brake pedal and the unlock button pressed on the selector lever.

In the gear selector switch (GWS), a total of 3 actuators are used for the 3 interlocks.

An electric motor with downstream transmission is used for the automatic return from the manual gate into the automatic gutter as well as for interlocking the manual gutter.

A bidirectional, spring-centered twin magnet (electromagnet) is used for the interlock towards selector-lever position "R".

a single magnet (electromagnet) with spring is used for the interlock towards selector-lever position "D". The interlocks are only supplied with current after terminal 15 On.

This ensures that no shifting path in the automatic mode is interlocked in the event of faults by the deployed actuators.