Hyundai Equus: Engine oil and filter

Explanation of scheduled maintenance items

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Drive belts

Inspect all drive belts for evidence of cuts, cracks, excessive wear or oil saturation and replace if necessary. ...

See also:

Relay Box (Engine Compartment) Components and Components Location
Component Location ...

Knee Airbag (KAB) Module Repair procedures
Removal 1. Disconnect the battery negative cable and wait for at least three minutes before beginning work. 2. Remove the crash pad lower panel. (Refer to Body - "Crash Pad Lower Panel") ...

Auto Door Lock/Unlock Features
You can modify some of the auto door lock/unlock features from the User Setting Mode. Refer to the User Setting Mode in section 4. ...