Mercedes-Benz Zetros 2020 Operating Instructions Manual page 68

Operating the climate control systems
66
Switching engine preheating on/off
Problems with the auxiliary heating
If there is a malfunction, the auxiliary heating shows a fault code in the display.
If the display shows a fault code not listed here, inform a qualified specialist workshop.
Display messages
T84
Teb
Possible causes/consequences and M Solutions
The battery charge level is too low.
X
Charge the battery (
If the malfunction persists:
X
Consult a qualified specialist workshop.
Time error
After a voltage supply interruption of more than eight minutes, the
date and time must be reset.
X
Set the date/time on the timer.
If the malfunction persists:
X
Consult a qualified specialist workshop.
You can only preheat the engine when the
engine is not running.
X
To preheat the engine: press the upper
part of switch :.
Indicator lamp ; in the switch lights up if
the auxiliary heating is switched on.
X
To switch off: press the lower section of
the switch.
Indicator lamp ; in the switch goes out.
Y
page 169).