The most remarkable aspect about the 2009 version of the Infiniti M Series cars that you get to view is in the rich expanse of their interiors. Basically, this luxury four-door sedan from the Infiniti stable is available in two models the M35x and the M45x. Performance-wise these cars provide you with an EPA (Environmental Protection Agency) rated mileage of 14 to 17 in the city and 21 to 25 on the highway.

The M35 and the M35x both come with a 3.5 liter 6-cylinder enhanced 303hp (horse power) engine and the M45 and the M45x are available with a 4.5 liter 8-cylinder 325hp engine. The M35 and the M35x are available in rear wheel drive (RWD) configuration with a new 7-speed automatic transmission. On the other hand the M45 and the M45x are available in all-wheel-drive (AWD) configuration and coupled with 5-speed automatic transmission.

The Drive Shift mode is available in all automatic transmission M series cars. Besides this a very good feature in these cars is the self healing clear-coat paint finish that provides Scratch Shield protection on all the models. However, it is in their interior design that the Infiniti M series cars really excel the competition. The interior straightaway attracts you like nothing else will and invigorates your senses.

The grace of resplendent luxury is there for you to gather in your senses. The Fine Vision electroluminescent gauges draw your eyes toward them with sheer visual magnetism. The instrument console design is adorned with gear-like rings. The surface texturing is provided with a unique trim of aluminum surrounded by wood trim.

The front-seats on the M series cars are climate-controlled whereas the reclining seats on the rear are of the heated power type. With M series cars you win also because of the advanced Bose Studio Surround sound system that provides you music from a total of 14 speakers through 5.1-channel decoding. Of these, two are ensconced one each in the shoulder of each front seat.

Sport Package equipped M series cars come with a uniquely stitched cover on the steering wheel and the gear shift knob. They also come with aluminum-trimmed pedals and exquisite front seat designs. Standard colors on the interior of M series cars are Wheat, Graphite, and Stone.

Considering the loads of music that you as a music lover will like to have in your sports sedan, Infiniti provides a Music Box equipped with 9.3 GB hard drive on M series cars. Other useful accessories in these cars designed to cater to your requirements include the Hands-free Bluetooth Phone. Satellite Radio is an option worth considering but remember that you need to buy it separately with a subscription based offering. It comes from XM.