6 Series 635d (M57T2) Coupe
A rocker switch is provided on the seat to adjust the lumbar support.
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Seat memory button
Only the driver's seat features additional buttons for the seat memory.
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Seat heating switch
The buttons for controlling the seat heating are included in the centre console switch cluster.
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Hall sensors
Hall sensors are installed for the purpose of detecting the position of the seats. The sensors are integrated in the
seat drive units.
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Temperature sensor for seat heating
A temperature sensor is installed in each of the seat cushions for the seat heating.
The seats are controlled by the following control units:
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Centre console switch cluster
In addition to the switches, the electronic circuits for the heating control and monitoring functions are integrated
in the centre console switch cluster (SZM). The SZM is also responsible for the electronic control of the steering
column adjustment function. [more ...]
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E63/E64 Driver's seat module
The control unit of the driver's seat module (SMFA) communicates via the K-bus with the centre console switch
cluster (SZM).
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Passenger's seat module, E64 only
The control unit of the passenger's seat module (SMBF) communicates via the K-bus with the centre console
switch cluster (SZM).
In the E63 the drive units are controlled directly by a load circuit.
The following actuators are driven to perform the seat functions:
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Seat heating
The seat cushion heating and backrest heating are installed such that they cover the entire area. Even the side
sections and thigh supports are heated: [more ...]
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Seat adjustment drive units
The following drive units are installed in the E63 and E64 seat:
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Drive unit for seat forward/backward adjustment with 2 adjustment speeds
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Drive unit for seat height adjustment
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Drive unit for seat cushion tilt adjustment
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Drive unit for backrest angle adjustment
Additionally installed in the E64:
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Drive unit for head restraint height adjustment
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Head restraint angle adjustment
The head restraint angle adjustment as well as the seat depth adjustment on the sports seat are always manual.
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Lumbar support
The lumbar support in the seat backrest consists of 2 lumbar cushions as well as an electric air pump with
electrically operated valves.
The following displays provide seat status information:
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Central Information Display
A corresponding check control message is shown on the central information display (CID) when, for example, a
SBT Electrically adjustable seats E63, E64
BMW AG - TIS
22.01.2013 23:19
Issue status (12/2007) Valid only until next DVD is issued
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