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Best Bets get average or better mpg, have average or better reliability, good crash-test ratings, and our experts' recommendations.
By Jim Flammang
October 4, 2005
Vehicle Overview After 12 years in its previous form, a wholly restyled Mercedes-Benz SL500 two-seat convertible went on sale as an early 2003 model. Unlike the prior SL-Class, which had a fabric top, the 2003 version was equipped with a retractable hardtop. At the push of a button, the car can transform from a roadster to a watertight coupe in 16 seconds.
New electronic brake control was used. Variable brake proportioning could apply added pressure to the outside wheels to enhance control when braking in turns.
Soon after the emergence of the SL500, a high-performance SL55 AMG edition went on sale. Then came an SL600 with a bi-turbo V-12. An even stronger SL65 AMG with a 604-horsepower, twin-turbo 6.0-liter V-12 capable of reaching 60 mph in 4.2 seconds debuted for the 2005 model year.
The SL500 got a new seven-speed-automatic transmission for 2004. An Electronic Stability Program and Active Body Control — an active suspension system that virtually eliminates body roll — are standard.
Run-flat tires are newly optional on 2006 models. New 18-inch double-spoke wheels are included with the AMG Sport Package. The SL-Class competes against Aston Martin models, the Jaguar XK8 and the Porsche 911. (Skip to details on the:
SL55 AMG |
Exterior Introduced for 2003, the SL500 was an evolution of the previous-generation SL-Class roadster, and it changed substantially in appearance. Styling touches were reminiscent of SLs of the past. The automaker said clear-glass xenon high-intensity-discharge headlights were considered a "more dynamic variation on the familiar 'twin-headlamp' theme." An "intelligent" tilting mechanism ensures that the roof retracts into the upper section of the trunk.
Aluminum is used to keep body weight down. The slippery-shaped SL500 has a 0.29 coefficient of drag.
Interior Leather, fine wood and aluminum are used in the SL500's interior. Matte chrome surrounds the four separate chronometer-styled instruments on the dashboard. Cargo capacity is 7.2 cubic feet with the top down and 10.2 cubic feet when the roof is up. Distronic adaptive cruise control is optional.
Under the Hood The 302-hp, 5.0-liter V-8 in the SL500 mates to a seven-speed-automatic transmission.
Safety Standard side-impact airbags are designed to protect an occupant's head and thorax. A driver's side knee airbag is installed. Automatic roll bars pop up within 0.3 seconds when the system senses an impending rollover.
Driving Impressions Like all Mercedes-Benz models, the SL500 has a markedly heavy feel, but it's less bothersome in this car than in some others. The SL500 has many enticing features, such as super-supportive seats. The powertrain produces quick and energetic responses after slight hesitation when starting off and downshifting.
Highly stable on the road, the SL500 clings securely to the pavement. Though heavy-feeling overall, it delivers excellent steering response with appropriate effort. All told, the SL500 is more boulevard cruiser than hard-core sports car, and it delivers outstanding ride comfort under most conditions.
Controls range from cryptic to ambiguous. Mercedes-Benz's navigation system is next to useless; the small screen becomes almost invisible in daylight. Its hooded, finely calibrated gauges, on the other hand, are reasonably easy to read. Trunk space is skimpy due to intrusion from the retractable hardtop.�
SL55 AMG The SL55 AMG is equipped with a 5.5-liter supercharged V-8 that produces 493 hp and 516 pounds-feet of torque. This car was the fastest production Mercedes-Benz ever manufactured until it was overtaken by other AMG variants. Its five-speed-automatic transmission has SpeedShift buttons on the steering wheel. Racing-derived brakes are installed, and other components have been adapted to work with the higher engine output.
Mercedes-Benz claims the SL55 AMG can accelerate from zero to 60 mph in 4.5 seconds, versus a more leisurely 6.1 seconds for the SL500.
Distinctive AMG bumpers and side skirts highlight the SL55 AMG, which features five-spoke 18-inch wheels and a quartet of exhaust pipes at the rear. The interior features special sport seats and aluminum trim. Back to top�
SL600 Introduced as a 2004 model, the SL600 holds a twin-turbo 5.5-liter V-12 that produces 493 hp at 5,000 rpm and 590 pounds-feet of torque as early as 1,800 rpm. Its five-speed-automatic transmission incorporates Touch Shift operation for manually selected gear changes. Though engine horsepower is identical in both the SL600 and SL55 AMG, the automaker says the SL600 differs in character; its power delivery is more refined and exhibits greater torque output.
The same brakes are used in the SL600 and SL55 AMG. Five-spoke 18-inch alloy wheels are installed. A chrome grille and subtle "V12" badges identify the SL600. Nappa leather on the active ventilated seats comes in a choice of colors. An integrated digital phone is standard. Keyless Go, a heated steering wheel and corner-illuminating fog lamps are standard on the 2006 SL600.
Mercedes-Benz managed to combine ferocity and luxury in the SL600, which flaunts a noticeable exhaust note and posh occupant fittings. Tromp the gas pedal while standing still and the SL600 lunges forward with a triumphant burst of power. Response is no less dramatic when pushing the throttle at higher speeds. SL600 drivers will likely feel supremely confident when passing and merging.
Few cars are more lavishly upholstered than the SL600, which features masterfully stitched leather that cradles its occupants. The seats are snugly bolstered. Rich-looking wood on the console and doors rounds out the interior.
Serious luxury also shows through in this SL's compliant suspension. The ride is far smoother than in a typical sports car. A wind blocker helps when the top is down, but some buffeting may occur regardless.
Is it excessive? Of course it is, but at least the SL600 delivers an enjoyable form of automotive excess. Back to top�
SL65 AMG If an SL55 AMG simply won't suffice, Mercedes-Benz also offers a super-potent SL65 AMG version. Rather than a measly 493 hp, the SL65 AMG is equipped with a twin-turbo 6.0-liter V-12 that cranks out a whopping 604 hp and 738 pounds-feet of torque. That's sufficient to deliver a 0-to-60-mph acceleration time of 4.2 seconds.
Hand-built at the AMG engine facility by a single specialist, the V-12 is signed by that craftsperson. The SL65 AMG is the first Mercedes/AMG product to be fitted with a limited-slip rear differential. AMG wheels hold 19-inch tires. Back to top
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