BMW F97 Technical Training Manual page 33

F97/F98￿Complete￿Vehicle
4.￿Powertrain
Index
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2
3
4
5
6
7
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.
Explanation
M￿Dynamic￿Stability￿Control￿(M￿DSC)
M￿transfer￿box￿(M￿VTG)
Power￿distribution￿box,￿front￿right
Body￿Domain￿Controller￿(BDC)
Advanced￿Crash￿Safety￿Module￿(ACSM)
Head￿Unit￿HU￿(M-specific)
Central￿Information￿Display￿(CID)
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