For the Second-Generation (WJ) Jeep Grand Cherokee, identify the specific years that featured the 'Quadra-Drive' four-wheel-drive system. Additionally, list the new technology features introduced with the WJ Grand Cherokee, and state the primary benefit of its UniFrame construction method.
Navigate to the 'Second-Generation WJ / WG Jeep Grand Cherokee Guide' page. Scroll down to find the section discussing the 'Quadra-Drive' system and identify the model years it was featured. Locate the section detailing 'New Technology Features' and list them. Find the section describing the 'UniFrame' construction and extract its primary benefit. Synthesize all identified information into a concise answer.
State the specific years the 'Quadra-Drive' system was featured (e.g., 'introduced in the WJ' or 'all WJ model years'). List at least three new technology features introduced with the WJ Grand Cherokee (e.g., HomeLink, dual-zone climate control, driver memory systems, power-adjustable foot pedals, SRS side-curtain airbags, Uconnect Bluetooth connectivity, Sirius satellite radio). State the primary benefit of the UniFrame construction (e.g., 'combines durability of body-on-frame with efficiencies/strength of unibody').