Intelligent Cruise Control maintains a safe following distance when cruising on the highway and Intelligent Brake Assist with Forward Crash Warning watches the road ahead for obstructions, and sounds an alert and preps the brakes when a collision is imminent. However, tap one button on the steering wheel and these systems all switch from passive alerts to active driver aid systems.
Blind-spot and lane departure warnings become intervention systems that can pull the vehicle back in line when you attempt to merge into an obstruction or drift out of your lane. With the Distance Control Assist system active, the accelerator pedal servo from the Eco Pedal is again called into play. If the system detects that you're approaching a vehicle ahead too quickly and have made no attempt to slow yourself, it will assume that you're not paying attention and gently remove your foot's pressure from the accelerator while applying automatic brake pressure to maintain a safe travel distance -- all the way down to a complete stop if necessary.
You can force through the feedback if you really want to hit the car ahead, but I rather liked this implementation of the technology. The Technology package also adds Adaptive Front Lighting, which steers the headlights into a bend when you turn the steering wheel, and motorized precrash seatbelts for the front seats that cinch up before a collision to hold the occupants in place. Infotainment tech You'll notice that the Technology package didn't add any infotainment options to the M56's feature list.
That's because the sedan makes almost all of its cabin technology standard features. Even with no option boxes checked, the M56 rolls off of the dealer's lot packing a hard-drive-based navigation system that combines Infiniti Connect with NavTraffic and NavWeather. The navigation system features crisp maps and quick searching for destinations, but I ran into a few hiccups that kept me from loving it. For starters, entering a destination simply involves too many steps.
I couldn't understand why a system that is location-aware by nature required me to input my city and state for every address, rather than just returning the nearest results first. Even when using voice input for a street address, Infiniti's system put me through six to seven prompts for each destination.
Additionally, while the chosen routes were usually acceptable, on a few occasions, the system seemed to send me out of my way. During one particular trip, the system asked me to drive almost an hour out of my way for a trip to avoid congestion of a bridge and wouldn't provide a shorter route until I eventually ignored the prompts and took the obvious route myself. The Infiniti Connection service is an OnStar-like telematics system that gives drivers access to automatic collision notifications, remote door unlocking, stolen vehicle recovery, and a host of other connected features, but I mostly used the system to search the Web for navigation destinations not present in the local database.
A year of complimentary Infiniti Connection service is also included with the M56 purchase. However, after the Infiniti Connect and SiriusXM trials end, the M Sedan's driver will be responsible for maintaining two separate subscriptions to keep the same level of infotainment functionality that the car rolled off of the lot with.
It's a shame that all of that data can't just be piped through the single Infiniti Connection data stream. That's pretty much every source that we could ask for outside of HD Radio, but I don't think that anyone will lose too much sleep over that omission. The standard audio rig is a speaker Bose stereo system, but the aforementioned Sport package bumps our M56 up to a speaker, 5.
Audio quality is good, but also nothing to get too excited about. I noticed quite a bit of low-end distortion in the bass and a bit of rattle coming from somewhere in the cabin even at moderate volumes. Other standard niceties include a rearview monitor, a sonar-based rear proximity system, HID headlamps, eight-way power-adjustable front seats with heated and ventilated surfaces, and Intelligent Key entry with push-button start.
It's a capable car, but the M56 isn't particularly fun to drive. We will feed your curiosity in this subject. Learn more about the M56's top speed acceleration from MPH. You may compare M56 time evolution across all the trims and years.
Also, consider Infiniti M56 quarter mile performance specs. Comparing cars is a real fun. Since time has been considered the golden standard of cars' performance, let's put M56 face to face with the rivals by analyzing 0 to 60 mph, 60 to 80 mph and a quarter mile acceleration data.
We've created a convenient proprietary M56 time calculations that we base on the most accurate sources, including the manufacturer's manuals. While the data are estimates, they'll help you to make the right comparisons. The other ongoing area of kvetching falls into the comfort category. Road noise is transmitted by the suspension and is particularly loud in the rear cabin. Reactions to these features have ranged from indifferent to irritated, and drivers quickly identified the functions that could be defeated, leaving them dormant as much as possible.
Reaction to the eco mode has been uniformly hostile. Just past the halfway point of its 40,mile Car and Driver tenure, our Infiniti M56 Sport is logging plenty of long-distance miles—from Ann Arbor to Winnipeg, Minneapolis, and upstate New York, to name a few destinations.
We have noted a strange chorus of sounds. These observations have been communicated to our Infiniti dealer during routine service visits, but the service techs have been unable to find any cause. In addition, a number of logbook comments concern road noise.
The combination of wheels, tires, and suspension gives the M56 a pretty stiff ride—borderline harsh on bumpy pavement—and transmits a substantial amount of noise on almost any surface.
In addition to routine dealer maintenance visits at miles and 15, miles for an oil change, tire rotation, and manufacturer updates for the ECM and nav system, we took the M56 in for an unscheduled stop at 17, miles to resolve complaints about brake noise, tramlining, a moderate vibration, and a slight pull to the right in straight-ahead operation.
The technicians were unable to find any problem with the brakes but performed a side-to-side tire rotation and four-wheel alignment that restored straight-line stability. We will soon make another visit, this time to replace the windshield, which has developed a crack of unknown origin along its base. Although the M56 has drawn some logbook flak for traits that seem out of place in a luxury sedan, its robust 5.
As impressive as the engine performance is its accompanying fuel economy. A powertrain such as this, in the hands of a test crew such as ours, tends to provoke a lot of excesses with the throttle, but so far the M56—EPA rated for 16 mpg city, 25 highway, 19 combined—has exceeded the all-around forecast with a test average of more than 20 mpg. The DOHC valve, 3. The eight-cylinder car, meanwhile, has morphed into a new designation—M56—denoting its 5. The new V-8 is what drew us to the order book.
If the M45 was good enough to prevail in comparison tests involving sports sedans with heavy German accents, a more potent version—much more potent—should be an exceptionally compelling companion for the long haul.
Fresh out of the box, our M56 managed a 0-tomph time of 4. The tires afforded a so-so 0. Included under this heading are adaptive cruise control, distance-control assist, blind-spot warning, blind-spot intervention, lane-departure warning, brake assist, pre-crash front-seatbelt response, forward-collision warning, and adaptive headlights. A sure sign of popularity with our staff is how quickly a long-term test car accumulates miles, and by this standard the M56 appears to rank at least in the all-time upper quartile.
At miles, as a staffer was about to embark on a trip to New Jersey, we encountered a problem with the power sunroof.
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