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:

Keys
Two keys are provided and they fit all locks. Keep one in a safe place as a spare key. To help prevent theft, your keys feature a unique, hard-to-duplicate design. Also, your vehicle’s locks a ...

Tyres
WARNING • Driving with tyres that are worn, damaged or improperly inflated can lead to a loss of control or blow out of the tyres which can result in a collision with serious or fatal injury. ...

Operation from inside the vehicle
The boot lid (or tailgate) can be locked or unlocked by using the central door lock switch, regardless of the position of the ignition key. 1- Unlock 2- Lock If the boot lid (or tailgate) is loc ...