HLF

The abbreviation stands for HLF:

Assistance Löschgruppenfahrzeug, a German fire engine.
Hamburger fire engine, a special older type of vehicle the Hamburg fire brigade
Help fire truck ( Austria ), a further development of the Austrian Rüstlöschfahrzeugs
Assistance vehicle, a newer type designation in the Lower Austrian fire brigades
The ICAO code of the German airline TUIfly.