Volvo FM Handbook page 27

Instruments and controls
16
25-29 Switch for working lights
Switch for hydraulic kit or body
Switch for container lock
OBD-outlet
30-34 Switch for fifth wheel
Switch for spotlights
Switch for cab tilt
Switch for power take-off
Switch for Emergency Assistance Button
35
Stalk for trailer brake or switch for trailer brake, EBS or extra equipment
36 Climate control system
37
Radio, tachograph or Dynafleet
38
Radio or Dynafleet
39
USB port
40
Electrical outlet 12 V (Max 10 A)
41 Ashtray
42 Roof sign
43 Electric roof hatch
44 Thermostat
45 Spotlights
46 Switch for cab interior lighting