 |  |  |  |
Information systems | Travel 45 | Travel 55 | Travel 65 |
 |  |  |  |
Pre-installation for radio | x | x | x |
 |  |  |  |
Two-way loudspeakers at the front | x | x | x |
 |  |  |  |
Loudspeakers in luggage rack service sets | x | x | x |
 |  |  |  |
Climate control / heating / ventilation | | | |
 |  |  |  |
Regulated air conditioning with temperature control (7 kW) | x | x | x |
 |  |  |  |
AC408m air-conditioning system (8 kW) | x | x | x |
 |  |  |  |
Convector heaters | - | - | x |
 |  |  |  |
Auxiliary heat exchanger in passenger compartment | x | x | - |
 |  |  |  |
Hot-air auxiliary heater, electric | x | x | x |
 |  |  |  |
Hot-water auxiliary heater | x | x | x |
 |  |  |  |
Roof hatch, manually operated | x | x | x |
 |  |  |  |
Rear roof fan | - | - | x |
 |