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:

To turn from “ACC” to “LOCK”
1. [Vehicles equipped with M/T] Push the emergency key in at the “ACC” position and keep it depressed until it is turned to the “LOCK” position, and remove it. [Vehicles equipped with CVT ...

Steering wheel audio remote control switches
The remote control switch is located on the left side of the steering wheel. It can be used when the ignition switch or the operation mode is in ON or ACC. 1- Volume up button 2- Volume down butt ...

Ticket holder
The driver’s sun visor is provided with a ticket holder (A) on the backside. ...