In brief
Information may be involved in headlights and suspension.
Useful to know
The vehicle level sensor detects a position related to the height and inclination of the compartment. HELLA indicates applications in automatic headlight adjustment and adaptive running functions. [1]
It is not the same as a fuel level sensor or geographical position. When reading a diagnostic list specify which magnitude means "level". The general principle does not determine the number and locations of sensors in each car. A broken link or other deviation is evaluated by the exact scheme and working data, not just the name.
Sources
For further detail and to check the information: