Part 2

Seat functions (model 639)
The signals of the CAN-B outputs "Seat control" can be selected via a DAS menu mask. The individual menu items contain the following signals:
- Signal "Left front seat, head restraint up"
- Signal "Left front seat, head restraint down"
- Signal "Left front seat, backrest to front"
- Signal "Left front seat, backrest to rear"
- Signal "Left front seat (height at front), up"
- Signal "Left front seat (height at front), down"
- Signal "Left front seat (height at rear), up"
- Signal "Left front seat (height at rear), down"
- Signal "Left front seat (fore/aft adjustment), forward"
- Signal "Left front seat (fore/aft adjustment), backward"
- Signal "Right front seat, head restraint up"
- Signal "Right front seat, head restraint down"
- Signal "Right front seat, backrest to front"
- Signal "Right front seat, backrest to rear"
- Signal "Right front seat (height at front), up"
- Signal "Right front seat (height at front), down"
- Signal "Right front seat (height at rear), up"
- Signal "Right front seat (height at rear), down"
- Signal "Right front seat (fore/aft adjustment), forward"
- Signal "Right front seat (fore/aft adjustment), backward"

An active input sets the respective request (e.g. "Front left seat, head restraint up") on CAN-B. The head restraint of the left seat is raised.
The function requirement as of "circuit 15 ON" must be satisfied, otherwise the signal and the internal request will be canceled.

Central locking (CL [ZV])
The signals of the CAN-B outputs "Central locking" can be selected via a DAS menu mask.
The individual menu items contain the following signals:
- Signal "Unlock front doors"
- Signal "Lock front doors"
- Signal "Unlock load compartment"
- Signal "Lock load compartment"
- Signal "Unlock overall vehicle"
- Signal "Lock overall vehicle"

An active input sets the respective request (e.g. "Unlock front doors") on CAN-B. The driver door and front passenger door are unlocked. The signal is reset if the shutoff condition (e.g. "Front doors unlocked") is fulfilled. If the shutoff condition is not fulfilled after 1 s, the signal is reset and a further switch-on attempt is made. If after 3 switch-on attempts the driver door and front passenger door are unlocked, this signal is reset.

New switch-on attempts are made when the level of circuit 15 changes and when the input is activated again.
CAN B remains active with active signals in the keeping awake mode.
A fault entry is not made if the switch-on attempts are unsuccessful.
The following function requirements must be met:
- Only installed doors are taken into consideration. Doors that are not installed are regarded as unlocked.
- If one or more doors are open, these doors are regarded as unlocked.

Wiping and heating of windows
The signals of the CAN-B outputs "Wiping and heating of windows" can be selected via a DAS menu mask.
The individual menu items contain the following signals:
- Signal "Actuate touch wiping"
- Signal "Actuate wash"
- Signal "Actuate intermittent wipe (stage I)"
- Signal "Actuate normal wipe (stage II)"
- Signal "Actuate fast wipe (stage III)"
- Signal "Actuate wipe/wash function of rear window"
- Signal "Actuate rear window intermittent wipe"
- Signal "Switch on rear window heater"
- Signal "Switch on windshield heater" (model 906)

All signals are explained below in the same sequence as the menu items.

Signal "Actuate touch wiping"
An active input sets the request "Activate front wiper touch wiping" on CAN-B. The "Front wiper" function is activated in the touch wiping mode.
The following function requirements must be met:
- The "Front wiper" function is not activated via the wipe switch. The input is otherwise ignored until a new activation process begins.
- "Circuit 15R ON", otherwise the signal is canceled. The internal request remains active.

Signal "Actuate wash"
An active input sets the request "Activate front wiper wash" on CAN-B. The "Front wiper" function is activated in wash mode.
The following function requirements must be met:
- The "Front windshield wiper" is not activated via the windshield washer system switch. The input is otherwise ignored until a new activation process begins.
- "Circuit 15R ON", otherwise the signal is canceled. The internal request remains active.

Signal "Actuate intermittent wipe (stage I)", signal "Actuate normal wipe (stage II)" or signal "Actuate fast wipe (stage III)"
An active input sets the respective request (e.g. "Activate front wiper in intermittent stage") on CAN-B. The "Front wiper" function is activated in intermittent stage mode.
The following function requirements must be met:
- The "Front wiper" function is not activated via the wipe switch.
The input is otherwise ignored until a new activation process begins.
- "Circuit 15R ON", otherwise the signal is canceled. The internal request remains active.
- Activation resets lower wiper speeds that may still be active.

Signal "Actuate wipe/wash function of rear window"
An active input sets the request "Rear wiper washing" on CAN-B.
The "Rear wiper" function is switched on in wash mode.
The following function requirements must be met:
- If the "Rear wiper" function is switched on when the input is activated, the input is ignored until a new activation process begins.
- As of "circuit 15R ON", otherwise the signal and the internal request will be canceled.

Signal "Actuate rear window intermittent wipe"
An active input sets the request "Rear wiper intermittent" on CAN-B.
The "Rear wiper" function is switched on in intermittent wipe mode.
By means of parameterization it is possible to select whether a button or switch is connected as a control:
- If a button is parameterized, the output signal is reactivated when the button is pressed again.
- If a switch is parameterized, it must be switched off and then switched on again in order to reactivate the output signal.

The following function requirements must be met:
- If the "Rear wiper" function is switched on when the input is activated, the input is ignored until a new activation process begins.
- As of "circuit 15R ON", otherwise the signal and the internal request will be canceled.
- The input remains active until either the feedback comes via CAN-B that the "Rear wiper" function is in intermittent wipe or the function is reset via terminal 15R .

Parameterizable option
The "Button" or "Switch" setting is available.

Signal "Switch on rear window heater"
An active input sets the request "Rear window heater ON" on CAN-B. The "Rear window heater" function is switched on.
By means of parameterization it is possible to select whether a button or switch is connected as a control:
- If a button is parameterized, the output signal is reactivated when the button is pressed again.
- If a switch is parameterized, it must be switched off and then switched on again in order to reactivate the output signal.

The following function requirements must be met:
- If, when activating, the "Rear window heater" function is active or it has an open circuit, the input is ignored until a new activation process begins.
- The input remains active until either via CAN-B the feedback "Rear window heater active" is received or the function is reset by switching off the engine.
- As of "circuit 15R ON", otherwise the signal and the internal request will be canceled.
- The engine must be running at a stable idle speed, otherwise the input is ignored and the signal and internal activation are canceled.

Parameterizable option
The "Button" or "Switch" setting is available.

Signal "Switch on windshield heater" (model 906)
An active input sets the request "Windshield heater ON" on CAN-B. The "Windshield heater" function is switched on.
By means of parameterization it is possible to select whether a button or switch is connected as the control:
- If a button is parameterized, the output signal is reactivated when the button is pressed again.
- If a switch is parameterized, it must be switched off and then switched on again in order to reactivate the output signal.

The following function requirements must be met:
- If the "Windshield heater" function is switched on when the input is activated, the input is ignored until a new activation process begins.
- The input remains active until either the feedback "Windshield heater active" is received via CAN B or the function is reset by switching off the engine.
- As of "circuit 15R ON", otherwise the signal and the internal request will be canceled.
- The engine must be running at a stable idle speed, otherwise the input is ignored and the signal and internal activation are canceled.

Parameterizable option
The "Button" or "Switch" setting is available.

Various functions
The signals of the CAN-B outputs "Various functions" can be selected via a DAS menu mask.
The individual menu items contain the following signals:
- Signal "Activate starter lockout"
- Signal "Retarder actuated" (model 906)
- Signal "Retarder stage 1" (model 906)
- Signal "Retarder stage 2" (model 906)
- Signal "Retarder stage 3" (model 906)
- Signal "Switch on buzzer"
- Signal "Switch on intermittent buzzer"
- Signal "Audio mute"
- Signal "Lessening or shutoff of interior protection for auxiliary heater-warm air"

All signals are explained below in the same sequence as the menu items.

Signal "Activate starter lockout"
An active input sets the information "Starter lockout active" on CAN-B. The "Starter lockout" function is active and the engine cannot be started.
The function requirement that the starter is active while the request is made is detected. The input is ignored and the internal request is reset.
Reactivation cannot only be performed if the "Terminal 15R" signal was or is inactive.

If the starter lockout is active, CAN-B is active. Without assisted charging, the vehicle battery is loaded constantly with a current > approx. 1.5 A.

Retarder present (model 906)
If a retarder is installed, the parameterization must be adapted under "Various functions - Property parameterization".

This ensures that the ESP control unit (N30/4) knows that a retarder is present.

Risk of accident
Ensure that the parameterization is correctly adapted when installing a retarder. The ESP function can otherwise fail which could then cause accidents.

Signal "Retarder actuated" (model 906)
This signal must be assigned the "Retarder actuated" signal by means of parameterization.
This ensures that the ESP control unit knows that an active retarder is present.

Signal "Retarder stage 1", signal "Retarder stage 2" or signal "Retarder stage 3" (model 906)
By means of parameterization, the parameters "Retarder stage 1-3" must be assigned the stage set at the retarder. This ensures that the ESP control unit knows the current retarder stage.

Signal "Switch on buzzer"
An active input sets the request "Buzzer ON" on CAN-B. The warning buzzer in the instrument cluster is switched on.

Signal "Switch on intermittent buzzer"
An active input sets the request "Buzzer ON" to "ON" on CAN-B for the duration of the default value "Buzzer ON" and then to "OFF" for the default value "Buzzer OFF".

Parameterization options
The ON and OFF times for the buzzer can be found in "Signals to interior CAN bus - Various functions - Property parameterization".

Signal "Audio mute"
An active input sets the request "Audio mute" on CAN-B. The respective audio unit switches to audio mute mode.

Signal "Lessening or shutoff of interior protection for auxiliary heater-warm air"
The sensitivity of the interior protection is completely deactivated on model 639. On model 906, the sensitivity of the interior protection is reduced only.

An active input places on CAN-B the request "shut off/lessen interior protection shutoff for air-auxiliary heater". The sensitivity of the interior protection for the anti-theft alarm system (ATA [EDW]) is reduced.

Shutoff of interior protection for electrical pop-up roof (model 639)
An active input places the request "Lessen interior protection for electrical pop-up roof" on CAN B. The sensitivity of the interior protection for the ATA is reduced.