See also:

Rearview camera
The rearview camera will activate when the back-up light is ON with the ignition switch ON and the shift lever in the R (Reverse) position. This system is a supplemental system that shows beh ...

Engine coolant
The high-pressure cooling system has a reservoir filled with year-round antifreeze coolant. The reservoir is filled at the factory. Check the antifreeze protection and coolant level at least once ...

Roomy New Interior
However, the Optima's quiet new interior is more upscale and will accommodate four tall adults, or five in a pinch. Front seats are supportive, and the rear-seat area is impressively roomy—alt ...