INSIDE LINE

Follow-Up Test: 2006 Mercedes-Benz CLS55 AMG

Media Player

  • 2006 Mercedes-Benz CLS-Class Picture

    2006 Mercedes-Benz CLS-Class Picture

    The CLS55 is a performance car with no hard edges. There's little if any sacrifice in ride comfort compared to the standard CLS. | September 30, 2009

Road Test

Follow-Up Test: 2006 Mercedes-Benz CLS55 AMG

Supermodel With Biceps

    1 Rating
    The life of a supermodel used to be little more than starving to that critical point between slender and dead. But 21st-century society wants a bit of muscle on those bones. We don't want our supermodels ripped, just toned, with a few choice bulges.

    We also want some muscle on our cars. These days a luxury car isn't special unless it's the performance model with the big wheels. Mercedes knows this. That's why there's an AMG version of every Benz. Gargantuan power is a hallmark of the AMGs, but recently we encountered the ultimate fusion of elegance and might, the 2006 Mercedes-Benz CLS55 AMG.

    This 469-horsepower four-door coupe is a supermodel with biceps. It doesn't get casual glances. It gets ogled. Everywhere it goes. And with 516 pound-feet of torque, it has enough muscle to make it a natural predator of 95 percent of the cars on the road.

    Ridiculously Fast
    We know what you're thinking. All AMGs are ridiculously fast. Big deal.

    But the CLS55 is one of the fastest cars we've ever tested. Sixty miles an hour, an insignificant milestone for this car, goes by in just 4.6 seconds. By 12.7 seconds, you're through the quarter-mile doing over 111 mph.

    That's at the track, of course. Back in the real world, the CLS55 will have you convinced that triple-digit speeds are not only reasonable but necessary.

    It's not just the endless stream of torque from the force-fed 5.5-liter V8 that gets you hooked. It's the distinctive whir of the supercharger starting its windup. It's the muscle-car exhaust note. It's the utter calm at a 90-mph cruise.

    And did we mention that this 469-hp beast turned in 15.4 mpg over 1,000 miles? Not bad for a car that can hang with exotic supercars.

    Still, the drivetrain is not quite perfect. Most people would be happy with the Speedshift five-speed automatic transmission, as its sport and comfort modes allow you to tailor its behavior to your mood. But in manual mode the transmission doesn't match revs on downshifts. The trannies in the BMW 545i/645Ci and Infiniti M45 do. When a car costs $99,000, we want it all.

    Nimble but Never Harsh
    The CLS55 is about 4 inches longer, 2 inches wider and 40 pounds lighter than an E55 AMG sedan, which is powered by the same supercharged V8.

    To quicken its reflexes, AMG engineers went to work on the CLS500's adaptive Airmatic suspension, installing stiffer springs, shocks and stabilizer bars. Although the CLS55 is still too big to feel like a full-on sports car through tight turns, it delivers all the right sensations and carries itself with cool determination.

    Incredibly, the CLS55 sacrifices none of the CLS500's ride quality. Even in its firmest damper setting, it never feels harsh. Engage the comfort mode and the suspension positively smothers potholes. This is extra impressive when you realize the CLS55 rides on super-low-profile 19-inch tires.

    The steering is one of the best setups we've ever experienced in a Mercedes. It's light and tidy at low speeds, but once you start pushing hard, it picks up heft and gives you a good read on the pavement below.

    Shutting off the stability control gives you license to hang out the tail, if that's what you're into. And if you're willing to brake-torque it, you can lay down a strip of rubber on your own driveway.

    Strong Brakes, Vague Feel
    Although the CLS55 sticks with Mercedes' electrohydraulic braking system, AMG has fitted larger, thicker rotors at all four corners. An impressive eight-piston caliper clamps down on each of the massive 14.2-inch front discs.

    It's a sophisticated setup and we certainly can't argue with its effectiveness. At the test track, the CLS55 turned in progressively shorter 60-0 stopping distances, finally recording its best stop of 116 feet amidst warnings from the computer that the brakes were overheated.

    Unfortunately, pedal feel is vague with minimal differentiation between a little braking and a lot. This is typical in Benzes with electronic brakes, but more pronounced in the CLS55 than in the CLS500.

    So Many Curves
    You might need a shoehorn to get in and out of the cockpit, thanks to the four-door coupe's dramatically curving roofline and dash. But once the supportive sport seats give you a squeeze, the white-faced AMG gauges stare up at you and the nubs of the drilled aluminum pedals burrow into your sneaker treads, you'll be eager to hit the road.

    The AMG touches inside are subtle on the whole. Indeed, the major difference we noted is materials quality. Whereas the CLS500 gets a polyester headliner, the CLS55 gets Alcantara suede. Standard leather is replaced by high-grade napa hide.

    Designers often gravitate toward aluminum when dressing today's performance cars, but even in AMG form, the CLS is a warm and opulent car and that means classic wood. As in the CLS500, you have your choice of matte walnut or glossy laurel.

    Nickels and Dimes
    We wouldn't expect such an enticing package of performance and street presence to come cheap, but at the 2006 Mercedes-Benz CLS55 AMG's $87,320 starting price, we were surprised by what doesn't come standard. Xenon headlamps, parking sensors, a navigation system, a CD changer and ventilated seats all cost thousands extra.

    This may be chump change to the real-life CLS55 buyer, but with BMW's 500-hp M5 and M6 just around the corner, there's good reason to question paying almost $100K to get the Benz.

    For about 30 seconds anyway. Then you realize the Bimmers just aren't pretty enough to be supermodels.

    Sort By:

    Sort By:

    Close

    Share on Facebook Share on Facebook
    Share on Twitter Share on Twitter

    Advertisement

    Speed Read

    Featured Specs

    • 469 hp
    • 516 lb-ft of torque
    • 4.6-sec 0-60
    • 12.7-sec quarter-mile
    • $1,700 gas guzzler tax

    What Works

    A four-door that can run with exotics, handles like a smaller car, rides like a CLS500, has a body that won't quit.

    What Needs Work

    Nonlinear brake feel, transmission doesn't match revs.

    Tags

    Specs & Performance

    Vehicle
    Model year2006
    MakeMercedes-Benz
    ModelCLS55 AMG
    StyleN/A
    Base MSRP$87,320
    As-tested MSRP$98,880
    Drivetrain
    Drive typeRWD
    Engine typeSupercharged V8
    Displacement (cc/cu-in)5.5
    Horsepower (hp @ rpm)469@6100 rpm
    Torque (lb-ft @ rpm)516@2750-4000 rpm
    Transmission type5-speed automatic
    Chassis
    Suspension, frontIndependent double control arms, air springs, variable damping
    Suspension, rearIndependent five-link, air springs, variable damping.
    Steering typeRack-and-pinion
    Tire brandBridgestone
    Tire modelPotenza
    Tire size, front255/35ZR19
    Tire size, rear285/30ZR19
    Brakes, front4-wheel ventilated disc w/ ABS
    Track Test Results
    0-45 mph (sec.)3.3
    0-60 mph (sec.)4.6
    0-75 mph (sec.)6.3
    1/4-mile (sec. @ mph)12.7@111.5
    Braking, 30-0 mph (ft.)29.3
    60-0 mph (ft.)115.9
    Slalom, 6 x 100 ft. (mph)62.8
    Skid pad, 200-ft. diameter (lateral g)36.7
    Sound level @ idle (dB)49.5
    @ Full throttle (dB)78.6
    @ 70 mph cruise (dB)69.0
    Test Driver Ratings & Comments
    Acceleration commentsWe got our best time by leaving the stability control on and letting the automatic do the shifting. The car has a lot of bottom-end power and will spin the tires like mad on launch with the stability control off. The transmission shifts at 6,400 rpm in auto, and will automatically shift at redline in manual mode. The paddle shifters on the wheel are nice.
    Braking ratingExcellent
    Braking commentsNo fade whatsoever. The car tracked straight with amazing distances for a big sedan with hot brakes. Pedal feel is firm and confident, but not very progressive. No noticeable ABS noise or vibration.
    Handling ratingExcellent
    Handling commentsThe CLS55 is well balanced, but it's still a big sedan. The back end comes around in a hurry with the ESP turned off. There's lot of power, maybe too much because it's hard to regulate. Great steering.
    Testing Conditions
    Elevation (ft.)1050
    Temperature (°F)84
    Wind (mph, direction)2 mph
    Fuel Consumption
    EPA fuel economy (mpg)14 City 20 Highway
    Edmunds observed (mpg)15.4
    Fuel tank capacity (U.S. gal.)21.1
    Dimensions & Capacities
    Curb weight, mfr. claim (lbs.)4050
    Length (in.)194
    Width (in.)73.7
    Height (in.)54.7
    Wheelbase (in.)112.4
    Legroom, front (in.)42.1
    Legroom, rear (in.)28.1
    Headroom, front (in.)36.9
    Headroom, rear (in.)36.1
    Seating capacity4
    Cargo volume (cu-ft)15.8 cu. ft.
    Max. cargo volume, seats folded (cu-ft)(Seats do not fold)
    Warranty
    Bumper-to-bumper4 years/ 50,000 miles
    Powertrain4 years/ 50,000 miles
    Corrosion4 years/ 50,000 miles
    Roadside assistanceUnlimited years/Unlimited
    Free scheduled maintenanceN/A
    Safety
    Front airbagsStandard
    Side airbagsStandard
    Head airbagsStandard
    Antilock brakesStandard
    Electronic brake enhancementsElectrohydraulic braking, BrakeAssist
    Traction controlStandard
    Stability controlStandard
    Rollover protectionStandard
    Emergency assistance systemStandard
    NHTSA crash test, driverNot Tested
    NHTSA crash test, passengerNot Tested
    NHTSA crash test, side frontNot Tested
    NHTSA crash test, side rearNot Tested
    NHTSA rollover resistanceNot Tested
    CollapseSpecs and Performance Expand Collapse

    Advertisement