properly engaged? I'm planning to get a Daihatsu Terios (Perodua Nautica). What are the consequences if the Centre Differential Lock (CDL) is not properly engaged (for this particular car)? I heard that the engine will get noisy and it will also damage the gear box. Is these true? How do I know if a person (previous owner) has not done the steps correctly? In what situations other than being stucked in mud, will you use this feature?