| Model Year | 2008 | 2008 | 2008 | 2008 |
| Model | SL | SL | SL | SL |
| Trim | SL550 | SL600 | SL55 AMG | SL65 AMG |
| Engines | ||||
| Transmissions | ||||
| Drivetrains | ||||
| Tires | ||||
| Audio Systems | ||||
| Accessories | ||||
| Automatically maintains set distance behind preceding vehicle as well as set speed. Minimum speed around 30 mph. Replaces regular cruise control, and includes its value. | ||||
| Often must be ordered with power rear side windows, if these are available. | ||||
| Decklid can be opened and closed using buttons inside the vehicle and on the keyfob. | ||||
| Enter and start the vehicle without removing the key from your pocket. | ||||
| Unlock and lock the car using buttons on the keyfob. | ||||
| Operate the power windows, sunroof, and/or convertible roof using buttons on the keyfob. | ||||
| Homelink. | ||||
| Removable or foldable barrier extends upward behind the front seatbacks, preventing cold air from entering the front seat area. | ||||
| Brakes, Airbags, and Other Safety | ||||
| Rear disc brakes. | ||||
| If active, automatically move forward when the vehicle is rear-ended. Note: becoming less common. | ||||
| Only listed when pricing a single model because insufficient data for all cars. | ||||
| Automatically pulse the brakes in hard stops to prevent wheels from locking up, making it possible to brake and steer at the same time. | ||||
| In some convertibles. Automatically raise when a rollover is sensed. | ||||
| When a panic stop is sensed, fully applies the brakes. | ||||
| Mandatory, in all cars. | ||||
| Torso-level front row airbags, usually contained in the seats. Many also protect the head, but not as well as side curtain airbags. | ||||
| Beeps signal distance to object in front of vehicle. Parking aid. | ||||
| Beeps signal distance to object behind vehicle. Parking aid. | ||||
| Only listed if not standard on all trims. No value because no way to compare across models. | ||||
| Selectively applies the brakes to prevent excessive understeer or oversteer (spinning). | ||||
| Two types: a warning light when a tire is low on air and a pressure readout for each tire. | ||||
| Can be driven deflated for about 50 miles. Usually harm ride quality. Cars with these often have no spare tire. | ||||
| When a drive wheel slips, it is braked and/or engine power is reduced, restoring traction. | ||||
| Cargo Management | ||||
| Climate Control | ||||
| Automatically recirculates interior air when pollution is detected in outside air. | ||||
| Maintains set temperature in front row. Requires air conditioning and does not include its value. | ||||
| Temperature can be separately set for left and right sides of the passenger compartment. Requires air conditioning and does not include its value. | ||||
| Filters exterior air before it enters the passenger compartment. No default value because most cars have them, even in cases where they're not in the official list of features. | ||||
| Wipers automatically turn on and adjust their speed based on input from a rain sensor. | ||||
| Provides heat for an extended period of time after the engine has been cut off. | ||||
| Heating elements defrost area where front wipers rest. | ||||
| Drivetrain | ||||
| When one rear wheel spins, the differential locks up, sending power to the wheel with better traction. | ||||
| Engine / Motor | ||||
| Permits a higher top speed before fuel cutoff kicks in. | ||||
| Exterior | ||||
| Side skirts and possibly a front air dam and rear apron. | ||||
| Increasingly often these are not actually connected to the exhaust. | ||||
| One or more glass panels in the roof that cannot be opened or removed. | ||||
| Only listed if not standard on all trims. No value because no way to compare across models. | ||||
| Gas Guzzler Tax | ||||
| Infotainment | ||||
| Enables hands-free communication by wirelessly connecting a cell phone to a microphone and the vehicle's stereo speakers. | ||||
| CD changer in the glove compartment, trunk, or cargo area, beyond easy reach. Can be in addition to an in-dash CD player. | ||||
| Audio system capable of playing discs with MP3 files. | ||||
| Screen-based navigation system. | ||||
| XM or Sirius. Includes a subscription for three to six months, after which monthly fees apply. | ||||
| In-vehicle security, communications, and diagnostics system. For 2011 and newer cars often includes a remote app. Monthly fee after the first 1-12 months. | ||||
| Sometimes also includes voice control over climate control system. | ||||
| Includes frequencies for weather channels. Only listed when pricing a single model because incomplete data for all model. | ||||
| Instruments, Lights, and Mirrors | ||||
| Driver-side exterior mirror automatically dims when hit by headlights of following vehicle. | ||||
| Interior rearview mirror automatically dims when hit by headlights of following vehicle. | ||||
| Headlights automatically turn on and off. Includes value of automatic-off headlights. | ||||
| Lights illuminate area just ahead and to the side of the vehicle when the turn signals are used or the steering wheel is turned. | ||||
| Make it easier for following vehicles to see the vehicle in fog. | ||||
| Light wide area close in front of the vehicle. | ||||
| Clears ice and fog from mirrors. | ||||
| Includes value of non-illuminated vanity mirror. | ||||
| Includes value of non-illuminated vanity mirror. | ||||
| LEDs cast a soft glow over and/or highlight parts of the interior. | ||||
| Front row reading lights. | ||||
| One or both exterior mirrors tilt down when the transmission is in reverse, to provide view of the curb. | ||||
| Area around the vehicle is illuminated when the vehicle is remotely unlocked. | ||||
| Includes value of manual remote mirrors. | ||||
| Reports engine speed. | ||||
| Reports average fuel economy, and perhaps also instantaneous fuel economy, distance to empty, average speed, and other stats. | ||||
| Provide a brighter, whiter light than halogen headlights. | ||||
| Seats and Interior Trim | ||||
| Won't be listed in conjunction with wood or aluminum trim even if they are available together. | ||||
| Seating surfaces are trimmed in leather; other upholstery tends to be leatherette. | ||||
| Lower back support power-adjustable vertically as well as in and out. | ||||
| Lower back support power-adjustable vertically as well as in and out. | ||||
| Power-adjustable lower back support. | ||||
| Power-adjustable lower back support. | ||||
| Power adjustable bolsters on the seatback, to provide lateral support in hard turns. | ||||
| Power adjustable bolsters on the seatback, to provide lateral support in hard turns. | ||||
| Power-adjustable cushion length; provides better support for long legs. | ||||
| Power-adjustable cushion length; provides better support for long legs. | ||||
| Power tilting seat cushion; can take the form of a second height adjustment. | ||||
| Power tilting seat cushion; can take the form of a second height adjustment. | ||||
| Only listed if not standard on all trims. No value because no way to compare across models. | ||||
| Usually also includes synthetic suede on the pillars. | ||||
| Synthetic suede steering wheel rim. | ||||
| No additional value over leather upholstery because no way to standardize across all models. | ||||
| Real wood trim on instrument panel, door panels, and/or center console. | ||||
| Real wood comprises part of the steering wheel rim. | ||||
| Suspension, Wheels, and Tires | ||||
| Hydraulic semi-active struts severely reduce body roll in turns and can be used to adjust the ride height. | ||||
| Only listed if not standard on all trims. No value because no way to compare across models. | ||||
| Only listed if not standard on all trims. No value because no way to compare across models. | ||||
| Transmission | ||||
| Paddles or buttons that can be used to manually shift the transmission. Only listed when optional or not always included with an automatic transmission. | ||||
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