Navigator L 4x2 ($56,565) and Navigator L 4x4 ($59,465) are similarly equipped.

The Elite Package ($4,280) features a DVD-based navigation system, rear-seat DVD entertainment package with eight-inch screen, and power sunroof; the voice-activated navigation system includes Sirius Travel Link, with real time traffic, weather, and ski-resort conditions.The rear-seat DVD entertainment setup ($1,295) can be ordered separately.Stand-alone options include a remote starter ($345), 20-inch chromed wheels ($1,495).The Trailer Tow package ($595) includes rear load-leveling air suspension, heavy-duty hitch integrated with rear bumper, 2-inch receiver, heavy-duty radiator and transmission cooler, brake module wiring, four-pin and seven-pin connectors.The Monochrome Appearance Package ($420) includes body-colored trim and chrome accents, while the Monochrome Limited Edition Package ($620) adds Ebony wood trim and special leather colors inside.

Safety features include dual-stage front airbags, front-seat side-impact airbags, curtain-style head-protection airbags for all outboard seats with rollover sensor.All Navigators are equipped with Lincoln's AdvanceTrac electronic stability program with Roll Stability Control, which uses a gyroscopic roll-rate sensor to enhance rollover resistance.Four-channel antilock brakes (ABS), rearview camera, and a tire-pressure monitor are standard.

The leather is thick and soft.The plastics, with some retro-looking graining, are nice to the touch.There's a mix of satin-nickel and chrome peppered throughout the cabin, and nothing looks overtly cheap, as it does in some other recent products from Lincoln's parent Ford Motor Co.The only real gripe in our test vehicle was the seam where the wood panel for the center stack blended down into the wood on the center console.It felt more like a bump.

One of the Navigator's obvious strengths is space, seemingly acres of it, in all directions.

The front seats are large and thickly padded, yet they adjust to accommodate all sizes, from NBA forwards to those who must sit up close to the wheel to peer over the tall dash.Power adjustable pedals are standard, and they can be moved forward or back with a button on the dash.These pedals have their advantages, but they would be more valuable if the power-adjustable steering column telescoped in addition to moving up and down.Without a telescoping wheel, the pedals don't really add anything to the adjustment mix.If we had to choose one or the other, we'd choose the telescoping wheel.

One minor annoyance with the Navigator's driver's seat is the speed at which it automatically moves backward or forward when the key is removed or inserted.In most cases, this is a welcome feature that makes it easier to climb in and out of a tall vehicle, and the Navigator's slow-moving seat may or may not have been related to sub-zero temperatures during our test drive.Yet at times the driver's seat moved so slowly that you could literally be backed out of a parking space and going forward before it had returned to its set position.

Once the driver gets comfortable, however, it's hard to beat the commanding view ahead.A Greyhound bus or tractor-trailer rig are about the only vehicles on the road that can obstruct the driver's forward vision in a Navigator.

The gauge package is the weak link in the Navigator's interior.The dials look like they're straight out of the 1960s, with black script on a white background and white lighting.They're not as crisp as some other, more contemporary schemes.The speedometer and tachometer are fine, but the four auxiliary gauges across the top (fuel level and coolant temperature among them) aren't.They're small to begin with and essentially covered by the steering wheel rim if a driver likes to keep the wheel low in its travel range.

Switches and control buttons are generally well placed, concentrated in the center stack or on stalks on both sides of the wheel.Most are big enough to hit with gloved fingers, and they have a nice, positive operating action.The gripe here is a row of switches near the bottom of the stack controlling the fans and seat heating and cooling, among other things.The buttons are on the small side, but the illuminated pictographs on them are tiny, so they seem even smaller than they really are in the dark.

The voice-activated DVD navigation system features a 6.5-inch touch screen and speech technology that works in three languages.It also includes Sirius Travel Link, which provides uninterrupted, coast-to-coast coverage of real-time traffic data; weather reports (current and five day forecasts with storm information and even ski resort conditions); fuel options sorted by price or distance from more than 120,000 gas stations; major league pro and college sports as well as movie listings from more than 4,500 theaters.A six-month introductory subscription to Sirius is included at no cost.

We rate storage options in the Navigator slightly better than average.The front center console is big, with more than enough room for a fairly large purse, but it's countered by a small glove box that's all but filled by the owner's manual.There are hard pockets or bins at the bottom of all doors, with enough width and depth for phones, wallets or CDs, and flexible map pockets are located on the front seatbacks.The cupholders are deep and fairly useful, and front passengers can share those for the second row, which are located on the back of the center console.There are three more cupholders for the third seat.

The standard second-row seating arrangement is two captain's-style bucket seats.These are the choice if comfort for second-row passengers is the primary objective.On the other hand, a three-place second-row bench is available at no charge, and it doesn't give up much (except another storage console that goes between the buckets).The bench is not brick flat, as it is in some sport-utility vehicles.It offers some contour and bolstering to improve comfort without diminishing the value of the middle space.The bench seat is also split 40/20/40, so kids can fold down the back of the center section and feel as if they have their own space.Also, there's no center console to get in the way when the seats are folded.

Second-seat passengers have their own adjustment for temperature and airflow (between the floor and overhead vents), as well a power point located on the back of the front center console.The optional rear DVD entertainment system is mounted in its own overhead console, with the controls and input jacks.The eight-inch screen drops down in the center, and it includes two pairs of wireless headphones.

Headrests on the second- and third-row seats can fold down when the seats are empty.Good thing, because when they are up they reduce the scope of the rearview mirror considerably.The view rearward isn't all that broad in any case.Lincoln has offered a solution to this problem with its new rear backup camera.The image is shown in the rear-view mirror.It is quite small, no more than three inches across.While the image is useful, obstacles are not as easy to spot as they are in systems that show their images on six- or seven-inch dash-mounted screens.

Third-row seat access is easy, with a one-hand flip lever that folds the second seat forward and clears a wide path to the rear.Passengers already in the third seat have a strap release that reverses the process.The third seat is another of the Navigator's strengths.It will actually seat adults approaching six feet in reasonable comfort, as long as they're willing to climb back there.The longer Navigator L does not increase rear seat legroom, though it does add a few millimeters more hip and headroom.

Lincoln's power-folding rear seat is easy to use and can be handy.The seat is split, and operates with a pair of toggle switches just inside the power liftgate.Simply press one or both, and one or both seat halves fold flat to the load-floor level.We'd like it better if there were redundant switches on the dash, as there are for the rear sliding doors on a minivan, for example.And if the rear-seat headrests are up, the driver has to lean into (or climb into) the rear to manually release them before the power folding mechanism will work.

Cargo capacity for the Navigator L is 128 cubic feet with the second- and third-row seats folded.For perspective, that's more space than the entire interior volume of most passenger vehicles.Moreover, the dimensions of the Navigator L's load floor are largest in the class, with enough space for four-by-eight sheets of building material.Behind the third row of the Navigator L is 42.6 cubic feet of cargo space when the seats are upright.That's considerably more than any other luxury sport-utility, and almost as much as in the typical mid-size wagon with its rear seats folded.

A cargo divider folds up out of the floor behind the seats and essentially splits the load area in half, which helps control cargo by limiting the space over which packages or bags might slide back and forth.

The Navigator L is nearly 15 inches longer than the standard model, extending its full length to almost 19 feet.The extra length does not significantly change passenger accommodations, however.Besides making this big sport-utility even more challenging to park, the Navigator L's additional size translates entirely into an additional 25 cubic feet of storage space behind the third seat.That extra space (by itself) is about 30 percent larger than the trunk in a full-size luxury sedan like the Mercedes-Benz S-Class or Lexus LS460.

The Navigator's basic shape is clean, if slightly bland.It consists of mostly sheer, tapered surfaces that are consistent across the vehicle, with a chrome strip running below the windows.The profile is tidy for such a big vehicle, almost lean.

The front and rear were clearly designed in Lincoln's retro-style brand theme.The eye is immediately drawn to the big, intricate grille in front.Its horizontal and vertical lines are supposed to inspire thoughts of Lincoln's Star logo, and the high-intensity beam headlights on either side add a jeweled, classy look.A second, thinner grille below the bumper replicates the bigger one above, flanked in this case by the fog lights.

The taillights could be lifted from Lincoln's MKZ sedan.They're shaped like wings that cut into the liftgate and wrap around the rear corners, with chrome edging and a hard contrast between the red and white sections.

The details seem to be an attempt to spice up an otherwise staid look, as if Lincoln is trying to out-bling popular competitors like the Cadillac Escalade.The optional chrome hood accent is basically a thick piece of chrome tacked on the end of the hood above the grille.We'd find the Navigator more attractive without it, but it harkens back to the brand's heritage.

The Monochromatic Appearance Package extends the body color to the lower grille, lower bodyside cladding and side mirrors, while keeping the upper grille chrome.The resulting look has less bling, but arguably more style.The more ambitious Monochrome Limited Edition Package adds the chrome hood accent outside and, inside, decks the Navigator in Ebony wood trim and Stone or Camel leather with black inserts and black piping.

The Navigator comes standard with 18-inch double-spoke alloy wheels.The chromed 20-inch wheels look good, but have an adverse effect on ride quality and interior noise.We prefer the 18-inch wheels because the taller sidewalls soften the bumps and are better for towing.

Two exterior features have definite benefits.The outside mirrors are large, with repeating turn signals along the bottom edge and approach lamps underneath.The lamps light when the doors are unlocked with the remote key fob, and cast a nice circle of visibility around the doors.More than that, the big mirrors retract against the windows with the touch of a button.You'll appreciate this convenience when you pull a vehicle as large as the Navigator into a garage.

This Navigator also retains its trademark retractable running boards.When the doors open, these drop and extend about five inches, creating a step that makes climbing in and out easier.They are artfully integrated into the overall exterior design, and are almost impossible to detect when the doors are closed.

Smooth and quiet, the Navigator benefits from a fully independent rear suspension and technology aimed at reducing noise and vibration.However, it is essentially a truck, with a ladder-type box frame and separate body, so it is not as responsive as unit-body crossover SUVs such as the Lincoln MKX.(However, crossovers don't offer the towing capability of the Navigator.)

For 2010, Trailer Sway Control is standard, and the new MyKey system allows parents to program top speed and other functions, even maximum radio volume, handy when loaning the keys to younger members of the family.Rain-sensing wipers, EasyFuel capless refueling and other features add convenience.Ford's SYNC provides voice control of digital media players and Bluetooth-enabled devices.

Its independent rear suspension helps the Navigator ride as smoothly as any vehicle this size.The V8 engine and six-speed transmission work smoothly.

The Navigator offers real space for eight passengers, the towing and load potential of a truck along with the comfort and convenience of an expensive sedan.

The Lincoln Navigator comes in the standard size or a long-wheelbase version called the Navigator L.Any model can seat seven or eight, depending on the seating configuration ordered.The Navigator L is 15 inches longer than the standard version.Passenger accommodations are essentially the same, but the Navigator L provides an additional 25 cubic feet of cargo volume behind the third seat.

All models are equipped with a 310-hp 5.4-liter V8 and six-speed automatic transmission.Navigator is available with either rear-wheel drive (2WD) or electronically engaged four-wheel drive (4WD) that can be driven on dry pavement and includes low-range gearing.A Class IV trailer hitch is standard.

The Navigator is full of noise-mitigating technology, including acoustically dampened glass in the windshield and side windows.The body boom familiar in vehicles that are essentially big steel boxes, which often comes across as pulses of air hitting the eardrums, is nearly eliminated in the Navigator.The quiet seems to emphasize noise generated by the tires, which is the only noticeable encroachment on the solitude inside.

The optional 20-inch wheels and low-profile tires are noisy; when not whacking over bumps and pavement joints, there's the steady hum of tread on the road surface.We like the appearance of larger wheels, but the price of style is high in the Navigator.We recommend the standard 18-inch wheels and higher-sidewall tires, which offer a smoother, quieter ride.

The Navigator is as smooth inside as any body-on-frame truck we've tested, and generally free of annoying vibration.The ride is smooth, too (except for the effect of the 20-inch wheels), thanks partly to the fully independent rear suspension.Moreover, the rear suspension helps keep the rear tires pressed to the pavement on bumpy surfaces, eliminating most of that skipping feeling familiar in trucks with solid rear axles.There's no axle tramping over bumps or undulations, and a reasonably smooth driver can keep the Navigator's body (and those inside) nice and level through turns.

Steering is on the heavy side, perhaps surprisingly so in this type of vehicle.The good news here is that, for tracking curves or changing lanes, the steering feels responsive, direct and reasonably quick.The bad? In big, slow-speed turns, such as trying to whip into a parking space, the heavy steering feel can slow things down.Those who like the steering in smaller sedans will probably like the Navigator's.Those expecting airy, old-school Lincoln Town Car response may not.

Bottom line, the Navigator rides comfortably and handles competently in nearly every situation.Just don't try to get racy.This vehicle is a lot of mass to move, and in quick, hard, left-right turns, all that weight wants to sway in the direction opposite of your choosing.

Navigator's 5.4-liter single-overhead cam Triton V8 generates a maximum 310 horsepower, which is no longer particularly impressive by large SUV standards.The Triton delivers torque evenly, with similar thrust whether the engine is already turning 1000 or 4000 rpm, and the six-speed automatic transmission is a definite plus.There's more than enough acceleration in the Navigator to merge safely or turn quickly across traffic, and it's probably quicker than what we considered a fairly quick car in the mid-1990s.Yet at the bottom line, the Navigator accelerates more slowly than just about any luxury sport-utility we've driven in the past few years.

The automatic transmission might be the best.It's smooth and responsive.The Navigator's six-speed comes from ZF of Germany, and it was the first of its kind in a full-size SUV.It performs almost exactly as we like, shifting up or down when we would if we were doing it with a gear-change and clutch, and almost never shifting inappropriately.It will hold a gear when going downhill, for example, maximizing engine braking and reducing the need to use the wheel brakes.

While Navigator is down on power compared to competitors, a combination of factors, including the transmission, give it excellent towing capacity of 8,500-9,000 pounds (depending on model).Moreover, its Triton V8 runs on 87-octane Regular, while nearly all the other vehicles in this class demand Premium fuel.

Fuel economy for the Navigator is and EPA-estimated 14/20 mpg City/Highway; the EPA doesn't publish figures for the Navigator L models.

The Navigator is not an easy vehicle to park, and if you can parallel park this truck with any kind of consistency, you deserve some sort of award.The rearview camera, which comes standard, is helpful for judging distances to the car behind and alerting the driver to unseen objects.

The Trailer Tow package is a must for anyone who tows.We've found the load-leveling air suspension works very well.

NewCarTestDrive.com correspondent J.P.Vettraino reported from Detroit, with Kirk Bell in Chicago, and Mitch McCullough in Los Angeles.