I add DRL, but real DRL as I need to turn on the small light (first turn on the light knob) to make it lit.

pillar light, you mean the step door light? the step door plate have socket, just need to plug it in, no wiretapping needed.

I even added reverse camera, for V spec, also plug and play as the software already built in, just need to plug the camera.

The warranty is not void at all.

I already claim RM26,000 worth of parts from warranty in 6 months of Jazz ownership, its a looong story about it