Residual heat
The residual heat function makes it possible to use engine heat for heating the interior of the vehicle when the engine is not running.
With the ignition switched off and at an outside temperature of < 15o C, the function can be called up with the residual heat function button in the operating unit for a maximum time of 15 minutes. The system voltage is monitored and switched the function off at < 11.4 V. After being switched off by the undervoltage, the system is not switched on again even if the voltage exceeds 11.4 V once again.
Switch-on conditions for the residual heat function:
Residual heat function button ON
and
outside temperature < 15o C
and
engine temperature once > 70 o C
and
ignition key position terminal R or OFF
and
15 minutes after terminal 15 OFF not yet elapsed
and
system voltage > 11.4 V
Switch-off conditions for the residual heat function:
Residual heat function button OFF
or
Terminal 15 ON
or
system voltage < 11.4V
The residual heat function can be activated in ignition lock position OFF or at terminal R. Various settings are possible dependent on the ignition lock position.
Statuses at ignition lock 1:
Operating unit active
Temperature control adjustable
Flap program adjustable
Blower adjustable
Function lights ON
Right-hand button pad not active (defrost, rear window defogger, recirculated air/AUC and air conditioning)
Statuses at ignition lock 0:
Operating unit not active
Temperature control is set at ignition OFF
Flap program and blower setting as for independent heating
Only function light of residual heat function button active
The residual heat function makes it possible to use engine heat for heating the interior of the vehicle when the engine is not running.
With the ignition switched off and at an outside temperature of < 15o C, the function can be called up with the residual heat function button in the operating unit for a maximum time of 15 minutes. The system voltage is monitored and switched the function off at < 11.4 V. After being switched off by the undervoltage, the system is not switched on again even if the voltage exceeds 11.4 V once again.
Switch-on conditions for the residual heat function:
Residual heat function button ON
and
outside temperature < 15o C
and
engine temperature once > 70 o C
and
ignition key position terminal R or OFF
and
15 minutes after terminal 15 OFF not yet elapsed
and
system voltage > 11.4 V
Switch-off conditions for the residual heat function:
Residual heat function button OFF
or
Terminal 15 ON
or
system voltage < 11.4V
The residual heat function can be activated in ignition lock position OFF or at terminal R. Various settings are possible dependent on the ignition lock position.
Statuses at ignition lock 1:
Operating unit active
Temperature control adjustable
Flap program adjustable
Blower adjustable
Function lights ON
Right-hand button pad not active (defrost, rear window defogger, recirculated air/AUC and air conditioning)
Statuses at ignition lock 0:
Operating unit not active
Temperature control is set at ignition OFF
Flap program and blower setting as for independent heating
Only function light of residual heat function button active
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