What do the L, B, M, and +/- symbols on an automatic gearbox mean and when should you use them
Although not all cars have them, knowing these modes can make driving easier, increase safety, and protect your vehicle.
Automatic transmissions are becoming increasingly common, and positions like P (park), R (reverse), N (neutral), and D (drive) are familiar to everyone.
However, many still don’t know what the "L" symbol on the gear lever is for – even though it can be extremely useful in specific conditions.
What does "L" mean?
The "L" symbol stands for Low. When the gearbox is switched to this mode, it prevents automatic shifting into higher gears, keeping the vehicle in first or sometimes second gear.
This way, the engine operates at higher RPMs and delivers more torque, providing better power and control over the vehicle in challenging conditions, writes Index.
When to use "L"?
This mode is especially useful in the following situations:
Towing heavy loads – trailers, boats, or campers
Driving up steep inclines – the engine provides more power without shifting up
Driving down steep declines – allows engine braking, reducing strain on brakes
Driving on snow, mud, or sand – low speed and better control in tough conditions
Maneuvering in tight spaces – more precise control at low speeds
Important: constantly driving in "L" mode is not recommended as it increases fuel consumption and accelerates gearbox wear.
What does the "B" symbol on an automatic gearbox mean?
The "B" symbol (Brake) is most often found on hybrid vehicles and activates regenerative braking.
In this mode, the electric motor converts kinetic energy into electricity during deceleration, recharging the battery and slowing the vehicle down.
It is most useful on long downhill stretches, helping with controlled braking without overusing the brake pads, thereby extending their lifespan.
What do the "+", "–" and "M" symbols mean?
These symbols indicate the possibility of manual gear shifting:
M (Manual) – manual mode
"+ / –" indicates manually shifting up or down
This feature is ideal for:
Sporty driving
Driving in hilly areas
Towing heavy trailers
This way, the driver has more control over the vehicle, which can be invaluable in certain situations.
So, next time you get behind the wheel of a car with an automatic gearbox, use "L", "B", "M", or "+/–" if your gearbox includes any of these options.
Knowing about these modes can make driving easier, increase safety, and protect your vehicle.
