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Follow-Up Test: 2008 Mercedes-Benz S63 AMG

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  • 2008 Mercedes-Benz S-Class Picture

    2008 Mercedes-Benz S-Class Picture

    We averaged 13 mpg during our two weeks with the S63, which is rated at 11 city and 17 highway by the EPA. We also did a lot of burnouts. | September 15, 2009

Road Test

Follow-Up Test: 2008 Mercedes-Benz S63 AMG

S-Class: Nice. S-Class With AMG Engine: Nicer

    8 Ratings
    It's the head shot of the silver 1955 Mercedes 300 SL Gullwing you notice first, its doors reaching for the heavens and its timelessness staring you in the face. Like Brad Pitt doing his stuff for Levi's, it's the exploitation of the classically handsome for the advancement of rudimentary commerce, a celebrity endorsement for the 2008 Mercedes-Benz S63 AMG.

    This car is about more than a mere Monroney pricing label with a lot of zeroes at the end. It's as artistic a window sticker as you'll ever see, a document that speaks of speed, heritage and the justification for a 518-horsepower automobile that costs $135,235.

    And you do want an S63. It's not the best car in the world, but it's close. Finding flaw with this super sedan is like telling Francis Ford Coppola how he screwed up The Godfather. "Well, Mr. Coppola, I think you could have made it funnier, particularly that scene when Michael shoots the police captain in the face. Felt kinda dark."

    To put it in simple terms: S-Class, nice; S-Class with AMG engine, nicer.

    Accelerating Lies
    But there's still some controversy as to the size of this big engine, designed and built at Mercedes AMG. The car's window sticker as well as its fender badges read 6.3 liters. It's supposed to make you think of the famous Mercedes V8 of the 1960s.

    Yeah, and Al Gore rides private jets for the greater good of the environment.

    The car's 518-hp, double-overhead-cam, all-aluminum V8 actually displaces 6,208cc. That's 6.2 liters by anybody's measure except Mercedes. But then again, Mercedes also says the S63 AMG accelerates from zero to 60 mph in 4.5 seconds.

    Another fib.

    At our test track, this big, black behemoth sprinted from zero to 60 mph in 5.2 seconds. If you're disappointed, you've never experienced zero to 60 mph in 5.2 seconds. This car is fast. Blisteringly so. And it's nearly a full second quicker than your Uncle Leo's S550.

    Just don't pick any fights with the supercharged BMW B7 Alpina, which hits 60 mph in 5 seconds flat, or the twin-turbocharged S65 AMG V12, which rules the class with a 4.4-second performance.

    Those cars also outrun the S63 through the quarter-mile, but we wouldn't sweat it. Unless you're planning to visit the Beverly Hills Drag Strip and Plastic Surgery Center, the S63's 13.4-second run at 107.8 mph is more than quick enough to take care of most of your needs.

    As the World Turns
    Right now you're wondering if you can score a discount on your girlfriend's liposuction if you spend your weekend racing the S63 AMG in Trophy Stock.

    First of all, there's no way anyone who can afford a $135,000 S63 AMG has a girlfriend who actually needs liposuction. Just doesn't happen. So stop being ridiculous.

    On our skid pad the S63 generated 0.85g of grip, and it snaked through our slalom at 63.1 mph. That's awesome agility for a car of this size, but it's still behind the 0.90g and 66.3-mph performance of the heavier S65. And it's much slower than the 68.6-mph slalom run posted by the BMW B7 Alpina.

    Yeah, we were surprised, too. The S65 uses the same active body control system, the same air suspension, and the same wheels and tires as the S63, but it obviously changes direction better.

    In the real world amongst the common folk and the minivans, the S63's abilities are staggering. Tossing it around is to defy the laws of physics. Nothing this big and heavy should have this kind of athleticism or supply this level of entertainment. It does not leave you wanting more.

    It also matches the S65 feature for feature. Ever smoke a kid in a 350Z while simultaneously utilizing your active ventilated seat, night-vision display and hands-free communication system with voice control? It's fun.

    Fast and Thirsty
    But it's not for the weak of wallet. Or conscience.

    We averaged 13 mpg during our two weeks with the S63, which is rated at 11 city and 17 highway by the EPA. But don't feel too bad; you already paid your $3,000 gas-guzzler tax, so guzzle. Not to mention, you just bought your wife a Cadillac Escalade Hybrid. Life's too short for guilt.

    And the S63 is pure hedonism. From its IWC clock to its buttery suede headliner, to its glossy hand-polished walnut burl trim, to its 20-inch alloy wheels, this car is about reward. Self reward. It's a treat. And it's a perfect example of getting what you pay for.

    Just look at its monster front brakes. Each measures 15.4 inches in diameter and is over an inch thick. They're cross-drilled for cooling and wear massive calipers that are finished smooth, wear the AMG logo and cover more than a third of the rotor's surface area. Somebody get the Guggenheim on the phone. These brakes are mechanical works of art that haul the S63 down from 60 mph in a scant 118 feet.

    Go is always more fun than stop, and the S63 goes. With a peak torque rating of 465 pound-feet at 5,200 rpm, the big V8 offers plenty of push from idle all the way up to its 7,000-rpm redline. It's one of the finest normally aspirated engines in history and it delivers its thrust with a melodic muscle-car rumble worthy of a Beach Boys song. It's also the perfect match for the seven-speed automatic, which Mercedes lets you control with aluminum shift paddles.

    The Three Bears
    And so you've decided you want an S-Class, have ya?

    This is where you expect us to play Goldilocks. You know, the S550 is toooooooo soft. And the S65 AMG is tooooooooo hard. But the 2008 Mercedes-Benz S63 AMG is just right.

    Not this time. Don't be a fool; buy the best. And the Mercedes-Benz S65 is the best. Its 604-hp twin-turbo V12 makes it the quickest four-door sedan we've ever tested. It lights its tires up through two full gears and it outhandles the S63. Bottom line: If you can swing the S65 without making the kids go to public school, by all means, lay it down, Big Daddy. It's the one you want.

    To put it in the simplest terms: S-Class, nice; S-Class AMG with biggest engine, nicest.

    The manufacturer provided Edmunds this vehicle for the purposes of evaluation.

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    Speed Read

    Featured Specs

    • 518-hp 6.2-liter V8
    • 7-speed automatic transmission
    • 20-inch wheels
    • IWC clock

    What Works

    Fast, comfortable; proper V8 rumble; room for the kids.

    What Needs Work

    Not as quick as Mercedes says it is; expensive enough to buckle the knees; thirsty.

    Tags

    Specs & Performance

    Vehicle
    Model year2008
    MakeMercedes-Benz
    ModelS-Class
    StyleS63 AMG 4dr Sedan (6.2L 8cyl 7A)
    Base MSRP$127,000
    Options on test vehicleiPod integration kit ($425); Distronic PLUS ($2,870); Premium III ($2,090 -- includes Dynamic rearview monitor, night view assist); Cash Loyalty Credit (-$500 for missing standard equipment, real-time traffic display, bird's eye view, DVD play capability in head unit and auxilary inputs) and Customer Loyalty Ipod Integration Kit Credit (-$425).
    As-tested MSRP$135,235
    Drivetrain
    Drive typeRear-wheel drive
    Engine typeV8
    Displacement (cc/cu-in)6208cc (379cu-in)
    Block/head materialAluminum / Aluminum
    ValvetrainDOHC 4 valves/cyl, variable intake and exhaust valve timing
    Compression ratio (x:1)11.3
    Redline (rpm)7,200
    Horsepower (hp @ rpm)518 @ 6,800
    Torque (lb-ft @ rpm)465 @ 5,200
    Transmission type7-speed Automatic
    Chassis
    Suspension, frontMulti-link, air springs, adaptive damping, automatic level control
    Suspension, rearMulti-link, coil springs, adaptive damping, automatic level control, stabilizer bar
    Steering typeSpeed-proportional hydraulic-assist rack-and-pinion power steering
    Steering ratio (x:1)17.83:1
    Turning circle (ft.)40
    Tire brandPirelli
    Tire modelPZero
    Tire typeSummer performance
    Tire size, front255/35ZR20 Z
    Tire size, rear275/35ZR20 Z
    Wheel size20 X 8.5 front - 20 X 9.5 rear
    Wheel materialAluminum alloy
    Brakes, front15.4-in ventilated/cross-drilled disc
    Brakes, rear14.4-in ventilated/cross-drilled disc
    Track Test Results
    0-45 mph (sec.)3.6
    0-60 mph (sec.)5.2
    0-75 mph (sec.)7.3
    1/4-mile (sec. @ mph)13.4 @ 107.8
    Braking, 30-0 mph (ft.)30
    60-0 mph (ft.)118
    Slalom, 6 x 100 ft. (mph)63.1
    Skid pad, 200-ft. diameter (lateral g)0.85
    Sound level @ idle (dB)48.6
    @ Full throttle (dB)76.5
    @ 70 mph cruise (dB)68.7
    Test Driver Ratings & Comments
    Acceleration commentsTypical M-B overlord attempting to preserve the expensive hardware. A) Allows wheelspin but short-shifts; B) won't allow too much spin; C) finally in all manual mode w/ESP off, allows spin and then the tack is slow and I got rev limit in 1st. In other words it's difficult to say if I found the best run. Power comes on in a sneaky way so it's difficult to predict spin.
    Braking ratingExcellent
    Braking commentsPedal feels a little disconnected from the application of brakes. In other words, once an electronic threshold is crossed, it feels like an autopilot flipped the "brake" switch. Also, belts put a stranglehold on my torso each time.
    Handling ratingGood
    Handling commentsSkid: ABC is fighting natural body lean and feels a step behind and over corrects when it jumps in. No steering info from light wheel. Mild to moderate understeer with snap oversteer in a moment. Slalom: Counterintuitive body motions from the ABC system make it an alien experience to weave it between the cones. It actually leans into the cones rather than away. Also, jacking up the outside of the car while cornering makes it oversteer unexpectedly. Very strange and could catch some people out with ESP off.
    Testing Conditions
    Elevation (ft.)421
    Temperature (°F)84.1
    Wind (mph, direction)5.3
    Fuel Consumption
    EPA fuel economy (mpg)13 City / 20 Highway
    Edmunds observed (mpg)13.0 combined
    Fuel tank capacity (U.S. gal.)23.8
    Dimensions & Capacities
    Curb weight, mfr. claim (lbs.)4,665
    Curb weight, as tested (lbs.)4,854
    Weight distribution, as tested, f/r (%)53.5/46.5
    Length (in.)205.0
    Width (in.)73.7
    Height (in.)58.0
    Wheelbase (in.)124.6
    Track, front (in.)63.1
    Track, rear (in.)63.2
    Legroom, front (in.)41.9
    Legroom, rear (in.)42.3
    Headroom, front (in.)37.8
    Headroom, rear (in.)38.5
    Shoulder room, front (in.)59.1
    Shoulder room, rear (in.)58.7
    Seating capacity5
    Cargo volume (cu-ft)16.3
    Max. cargo volume, seats folded (cu-ft)Not available
    Warranty
    Bumper-to-bumper4 years / 50,000 miles
    Powertrain4 years / 50,000 miles
    Corrosion4 years / 50,000 miles
    Roadside assistanceUnlimited
    Free scheduled maintenanceNot available
    Safety
    Front airbagsStandard
    Side airbagsStandard dual front and dual rear
    Head airbagsStandard front and rear
    Knee airbagsNot available
    Antilock brakes4-wheel ABS
    Electronic brake enhancementsBrake assist, electronic brakeforce distribution
    Traction controlStandard
    Stability controlStandard
    Rollover protectionStandard
    Tire-pressure monitoring systemTire pressure monitoring
    Emergency assistance systemPre-collision safety system
    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

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