BMW M5 Wartungshandbuch PDF herunterladen (Seite 81)

13

7

Functions

Sequential M gearbox SMG 3

Special functions

Tow-start

The following procedure must be

implemented to activate this function:

• With the brake pedal depressed, turn the

ignition key to terminal 15

• Select position "N"

• Tow-start/pus-start the vehicle

• Shift selector lever to "S+" and hold in this

position.

The transmission control engages the gear

corresponding to the speed and activates the

clutch.

Hill ascent assistant

Compared to the SMG 2, the hill ascent

assistant function has now been automated.

This means the hill ascent assistant no longer

needs to be selected manually with the minus

shift paddle on the steering wheel and the

brake depressed as was the case with the

SMG 2 but it is now activated automatically

when the transmission system recognizes any

other position than "N".

The hill ascent assistant in the SMG 3 is now

an active system that makes use of the DSC to

control the vehicle via the wheel brakes on

uphill/downhill gradients (clutch load

reduction).

3 Further information on the hill ascent

assistant can be found in the Participant's

Manual "DSC MK60E5". 1

Launch control

The following procedure must be

implemented to activate the launch control

function:

• Vehicle stationary/engine running

• DSC in "OFF" position

• SMG in "S6" position

• Hold selector lever in "Minus" position

• Fully depress accelerator pedal and hold in

this position

• Release selector lever.

The engine speed is controlled at 4,000 rpm

in this function. After releasing the selector

lever, the clutch is applied with defined slip in

order to achieve the best acceleration values.

The SMG uses the front wheel speeds to

calculate and release the slip of the rear

wheels.

If the clutch monitoring logic detects clutch

overheating, the clutch is fully engaged (100

%) in order to protect the components.

Teaching in the axle difference

The teach-in function for the axle difference

must be initiated manually after a change in

the dynamic rolling circumference (tyre

change, snow chains, etc.) of one or several

wheels on the vehicle to ensure correct

operation of the transmission control system.

These differences are also adapted

automatically but with a considerable time

delay.

This function is initiated manually as follows:

• Vehicle speed between 30 and

150 km/h

• Transmission in position "N"

• Brakes not applied

• Pull both shift paddles on steering wheel for

2 seconds.

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