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88 UNDERSTANDING YOUR INSTRUMENT PANEL
U Upper Air Vents . . . . . . . . . . . . . . . . . . . . . . . . . 120
U Heated Rear Window (Optional) . . . . . . . . . . . 121
U Windshield Heater (Optional) . . . . . . . . . . . . . 121
U Residual Engine Heat Utilization (REST) . . . . 122
3 Air Conditioning, Regulated (Optional) . . . . . . 122
U Climate Control (on Vehicles with Air
Conditioning) . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
U Dehumidification
(on Vehicles with Air Conditioning) . . . . . . . . 124
U Air Conditioner for the Rear Passenger
Compartment (Optional) . . . . . . . . . . . . . . . . . 125
U Air Recirculation . . . . . . . . . . . . . . . . . . . . . . . . 126
U Air Strainer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
3 Electric Blower (Optional) . . . . . . . . . . . . . . . . . . . 128
3 Heater Booster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
3 Auxiliary Heater – Water or Air Heater
(Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
U Auxiliary Heater Switch . . . . . . . . . . . . . . . . . . 132
U Timer Auxiliary Heater . . . . . . . . . . . . . . . . . . . 132
U Settings with the Auxiliary Heater
switched on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
3 Auxiliary Heat Exchanger in Load
Compartment, only with Auxiliary Heater
(Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
3 Auxiliary Heater – Tips for Coping with
Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
U Overheating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138