ACD (Active centre differential systemACD (Active centre differential system  - Starting and driving - Mitsubishi Lancer Owner's Manual - Mitsubishi Lancer

The ACD is a system that improves acceleration performance and straight-ahead stability by regulating the differential limiting action and power drive distribution of the centre differential.

► Do not over-rely on the ACD. Even the ACD cannot prevent the natural laws Caution

► Do not over-rely on the ACD. Even the ACD cannot prevent the natural laws of physics from acting on the vehicle. This system, like any other system, has limits and cannot help you to maintain traction and control of the vehicle in all circumstances.
Reckless driving may lead to accidents.
It is the driver’s responsibility to drive carefully. This means taking into account the traffic, road and environmental conditions.
► Be sure to use tyres that are the same specified size, type, and brand, and have no difference in the amount of wear for all four wheels. Otherwise, the ACD may not work properly

► If the parking brake lever is pulled up while the vehicle is moving, the centre Note

► If the parking brake lever is pulled up while the vehicle is moving, the centre differential is designed to switch to a free state condition which will allow the rear wheel to lock easier.

See also:

Hill start assist (vehicles with Twin Clutch SST)
The hill start assist makes it easy to start off on a steep uphill slope by preventing the vehicle from moving backwards. It keeps the braking force for about 2 seconds when you move your foot fro ...

Moving the gearshift lever to the “R” (Reverse) position
Vehicles equipped with 5M/T To shift into the “R” (Reverse) position from 5th gear, move the gearshift lever to the “N” (Neutral) position, and then move it to the “R” (Reverse) positio ...

Lamp monitor buzzer
[When the engine was started using the key] If the driver’s door is opened when the key is in the “LOCK” or “ACC” position or removed from the ignition switch while the lamps are on, a b ...