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:

Ignition switch
[For vehicles equipped with keyless operation system] For information on operations for vehicles equipped with the keyless operation system, refer to “Keyless operation system: Engine switch”. ...

Operation of the outside rear-view mirrors (Vehicles equipped with mirror retractor switch)
To fold Within 30 seconds of locking the doors and tailgate using the LOCK switch (1), press the LOCK switch twice rapidly to fold the outside rear-view mirrors. To extend Within 30 seconds of un ...

Radio data system (RDS)
1 - AM/FM (FM/MW/LW selection) button 2 - PWR (On-Off) switch 3 - CT (Clock time) indicator 4 - RDS (Radio data system) indicator 5 - TP (Traffic program identification) indicator 6 - PTY (Prog ...