Just behind its new European diesel range, Infiniti has announced a new M35 Hybrid model at the Geneva Motor Show. The M35 Hybrid marks the luxury brand’s first gas-electric offering.

Based on the all-new M sedan, the M35 Hybrid pairs Infiniti’s 3.5L V6 with a compact hybrid drive system. Although Nissan, Infiniti’s parent company, has offered a hybrid in the form of the Altima Hybrid, the system used in the M represents Nissan’s first in-house designed hybrid drive system. Infiniti refers to its hybrid system as Infiniti Direct Response Hybrid.

The M35 Hybrid utilizes a unique twin-clutch system, enabling the gas engine to completely decouple from the driveline, reducing mechanical drag. Infiniti also says the M35 Hybrid can operate in complete electric mode with its lithium-ion battery pack in up to 50 percent of driving conditions.

Like the standard M sedan, the M35 Hybrid features a rear-wheel drive setup. The car’s electric motor can aid the gas engine in virtually all situations, ensuring maximum performance. Infiniti has not yet releases any technical specifications on the M35 Hybrid’s gas engine, but the auto brand did reveal the electric motor will add 68 horsepower and 200 lb-ft of torque.

The M35 Hybrid will be available in Infiniti dealers come spring 2011.