Fixing arrangement for vehicle roof mounting of an air conditioning module

A releasable fixing arrangement, comprising:

• a vehicle roof;
• an air conditioning installation having mutually opposite side surfaces comprising and having first fixing projections projecting from the mutually opposite side surfaces of the air conditioning installation;
• first and second positioning rail members comprising first openings which are open substantially upwardly in a mounted position of the positioning rail members, and, second fixing projections projecting from said positioning rail members outwardly thereof and located laterally beside said first openings;
• means for mounting the positioning rail members on the vehicle roof in mutually parallel relationship at a spacing from each other adapted to the spacing between said side surfaces of said air conditioning installation;
• first and second locking rail members adapted to co-operate with respective ones of said positioning rail members, said locking rail members each having slots adapted to be operatively associated with said second fixing projections;
• and, second openings adapted to be respectively associated with the first openings and which in the mounted position are open upwardly and which extend in an L-shaped configuration;
• and,
• fixing means on the positioning rail members and the locking rail members, operable for releasably securing said first fixing projections in said first openings in said positioning rail members and in said second openings in said locking rail members.