Volvo VNL 780 Operator's Manual page 430

420 MAINTENANCE AND LUBRICATION
VN: An indicator will appear in the Driver Information Display (DID) screen when there is
approximately 6.35 liters (1.5 gallons) remaining in the reservoir.
VHD: An indicator will appear in the DID screen when there is approximately 3.875 liters
(0.9 gallons) remaining in the reservoir.
Note: This indicator is optional. It can be deleted.
DANGER
DO NOT carry extra fuel containers in the
cab. Fuel containers, full or empty, may
leak, explode or give added fuel to a fire.
Failure to follow this precaution may lead
to serious personal injury or death.
DANGER
DO NOT smoke while fueling the vehicle.
The glow from the cigar/cigarette can
ignite the diesel fuel, causing an explosion
resulting in serious personal injury or
death.
DANGER
Do not remove the fuel tank cap near
an open flame. Diesel fuel vapors are
combustible and can cause an explosion
or fire, resulting in severe personal injury
or death.