BMW F97, Техническое учебное пособие

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F97/F98�Complete�Vehicle
4.�Powertrain
25
Effect
• Launch�Control�automatically�shifts�up�using�the�shortest�possible�gearshift�times�and
performance-optimized�shift�points�as�long�as�the�driver�keeps�the�accelerator�pedal�fully
depressed.
• The�start�flag�in�the�instrument�cluster�remains�active.
A�renewed�Launch�Control�start�is�possible�as�long�as�the�transmission�oil�temperature�satisfies�the
preconditions�for�this.
Automatic�deactivation
• The�driver�leaves�(even�if�only�briefly)�the�accelerator�pedal�full-load�range�during�acceleration.
A�manual�intervention�in�the�automatic�upshift,�for�example�via�the�gearshift�paddles�on�the�steering
wheel�or�the�gear�selector�lever,�does�not�interrupt�the�Launch�Control�process.
If�one�of�these�preheating/precooling�conditions�is�breached,�it�is�not�possible�to�activate�the�Launch
Control.
Also�at�excessive�transmission�oil�temperature�(e.g.�repeat�Launch�Control�or�race-like�start),�activation
is�blocked�up�until�an�acceptable�temperature�threshold�is�reached.
The�start�flag�goes�out�with�every�deactivation�and�the�automatic�forced�upshift�is�cancelled.
Premature�wear�occurs�as�a�result�of�the�high�load�of�the�vehicle�with�use�of�the�launch�control.
4.2.5.�Emergency�gearbox�release
A�mechanical�emergency�transmission�release�is�available�and�can�be�accessed�through�the�vehicle
underbody.�In�addition,�an�electronic�emergency�gearbox�release�is�implemented�as�it�is�in�automatic
transmissions�of�the�BMW�AG�vehicles.�If�the�vehicle�needs�to�be�towed,�the�guidance�in�the�owner's
manual�for�the�vehicle�must�be�followed.
Release�is�possible�if�the�starter�motor�can�crank�the�engine.�Before�the�parking�lock�is�released,�the
parking�brake�must�be�applied�in�order�to�prevent�the�vehicle�rolling�away.
Sequence Precondition/Action
1. Engage�selector�lever�position�N.
2. Press�and�hold�the�brake.
3. Press�the�start/stop�button�(the�starter�motor�must�start�up�audibly).
4. Keep�the�start/stop�button�pressed.