GF27.10-P-0001-06AHS Automatic Transmission (AT), Transmission Modes

GF27.10-P-0001-06AHS Automatic transmission (AT), transmission modes
- TRANSMISSION 722.904/907
- as of model year 09

Component Identification:

Gear indicator in instrument cluster in sport transmission mode "S" and comfort transmission mode "C"
It shows the driver the shift range currently selected "1, 2, 3, 4, 5, 6" or selector lever position "D, R, N, P".

Gear indicator in instrument cluster in manual transmission mode "M" (except code (494) USA version)
It shows the driver the engaged gear "1, 2, 3, 4, 5, 6, 7" or selector lever position "R, N, P".

Transmission mode display in instrument cluster
It indicates to the driver the program selection Sport "S", Comfort "C" or Manual "M" performed at the transmission modes switch (S16/5).

The data come from the fully integrated transmission control unit (VGS) (Y3/8n4) via drive CAN (CAN C) and from the lower control panel control unit via the interior CAN (CAN B) N72. 4 different functions can be selected using the DIRECT SELECT gear selector switch (S16/13) and 3 different transmission modes using the transmission mode switch (S16/5).

Selector lever positions
"P" Park lock and start position
"R" Reverse gear
"N" Neutral and start position (no power transmission, vehicle can move freely)
"D" Drive (all 7 forward gears are available)

Upshifting and downshifting
Upshifting and downshifting take place via the steering wheel gear shifter PLUS (S111/1) and steering wheel gear shifter MINUS (S110/1).

Press +: Upshift by one gear at a time. The shift range is expanded simultaneously in transmission modes "C" and "S".
Press and hold: Direct change to gear range "D".
Press -: Downshift by one gear at a time. The shift range is limited simultaneously in transmission modes "C" and "S".
Press and hold: The transmission changes into a shift range from which the vehicle can be accelerated or slowed down favorably.

If the shift range is restricted, upshifts occur close to the engine cutoff speed.

Component Identification:

Transmission mode switch
The following transmission modes can be selected:

Comfort transmission mode "C"
Starting off always in 2nd gear except in 1st gear range. The gear changes take place at lower engine speed.

Sport transmission mode "S"
Starting off in 1st gear for all driving situations.

Manual transmission mode "M"
Direct gear selection by means of the steering wheel gear shifter MINUS and steering wheel gear shifter PLUS.

When kick-down is actuated the upshifts and downshifts take place as in transmission mode Sport "S".