BMW F97 - Page 33

F97/F98�Complete�Vehicle
4.�Powertrain
29
Index Explanation
1 M�Dynamic�Stability�Control�(M�DSC)
2 M�transfer�box�(M�VTG)
3 Power�distribution�box,�front�right
4 Body�Domain�Controller�(BDC)
5 Advanced�Crash�Safety�Module�(ACSM)
6 Head�Unit�HU�(M-specific)
7 Central�Information�Display�(CID)
4.3.3.�Service�information
• The�vehicle�must�not�be�driven�when�the�front�propeller�shaft�has�been�removed.
• When�carrying�out�work�on�a�brake�test�stand,�it�is�not�necessary�to�take�into�account�any�all-
wheel�drive-specific�points.
(roller�mode�for�testing�the�brake�system�is�detected�automatically.)
• The�vehicle�must�not�be�towed�if�only�one�axle�is�raised.
• The�oil�filling�of�the�transfer�box�is�designed�for�the�entire�unit�service�life.
However,�a�fault�memory�entry�with�an�oil�change�recommendation�for�the�transfer�box�oil�is
stored�when�a�usage�of�150,000km�/�9300�miles�is�exceeded.
When�refilling�the�transfer�box�oil,�it�is�necessary�to�move�the�oil�partition�to�the�open�position
using�the�BMW�ISTA�diagnosis�system.
• Various�test�plans�are�available�in�the�BMW�diagnosis�system�ISTA�for�Service.
The�tire�tread�depth�as�well�as�the�tire�manufacturer�should�be�the�same�on�the�front�and�rear�axles�if
possible�in�order�to�ensure�proper�functioning�of�the�xDrive.�It�is�also�advisable�to�only�use�tires�that
have�been�approved�or�recommended�by�BMW�M.
4.3.4.�Lifetime�oil�filling
The�oil�filling�of�the�transfer�box�is�designed�for�the�entire�unit�service�life.�This�corresponds�to�a�usage
of�approximately�150,000km�/�9300�miles.�A�fault�code�entry�with�an�oil�change�recommendation�for
the�transfer�box�is�stored�when�this�mileage�is�exceeded.
The�transfer�box�does�not�have�an�oil�drain�plug.�The�oil�filling�to�be�renewed�must�be�removed�using
an�extractor�unit.
The�new�transfer�box�oil�can�be�filled�using�an�oil�filler�plug.
In�order�to�ensure�that�the�entire�oil�filling�has�been�exchanged,�the�oil�bulkhead�must�remain�open�for
the�duration�of�extraction�and�filling.