Certified Benz & Beemer Compares 2007 Mercedes Benz S-Class VS 2007 Audi A8 Near Scottsdale, AZ

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2007 Mercedes Benz S-Class

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2007 Audi A8

Safety Comparison

The S Class S600 has standard Brake Assist Plus, which use forward mounted sensors to detect an immediately impending crash and automatically apply the brakes at full-force in order to reduce the force of the crash. The A8 doesn't offer crash-mitigating automatic brakes.

An active infrared night vision system optional on the S Class helps the driver to more easily detect people, animals or other objects in front of the vehicle at night. Using an infrared camera and near-infrared lights to detect heat, the system then displays the image on a monitor in the dashboard. The A8 doesn’t offer a night vision system.

The S Class has standard Tele Aid, which uses a global positioning satellite (GPS) receiver and a cellular system to get driving directions, remotely unlock your doors if you lock your keys in, help track down your vehicle if it’s stolen or send emergency personnel to the scene if any airbags deploy. The A8 doesn’t offer a GPS response system, only a navigation computer with no live response for emergencies.

Both the S Class and the A8 have standard driver and passenger frontal airbags, front and rear side-impact airbags, head airbags, front and rear seatbelt pretensioners, height adjustable front shoulder belts, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding and available all-wheel drive.

Warranty Comparison

There are over 18 percent more Mercedes dealers than there are Audi dealers, which makes it easier to get service under the S Class’ warranty.

Engine Comparison

The S Class has more powerful engines than the A8:



S550 5.5 DOHC V8

382 HP

391 lbs.-ft.

S600 5.5 turbo V12

510 HP

612 lbs.-ft.

S65 6.0 turbo V12

604 HP

738 lbs.-ft.

A8 4.2 DOHC V8

350 HP

325 lbs.-ft.

A8 L W12 6.0 DOHC 12 cyl.

450 HP

428 lbs.-ft.

As tested in Car and Driver the S600 5.5 turbo V12 is faster than the A8 L W12 6.0 DOHC 12 cyl.:

S Class


Zero to 60 MPH

4.2 sec

5.1 sec

Zero to 100 MPH

9.7 sec

12.3 sec

5 to 60 MPH Rolling Start

4.6 sec

5.5 sec

Quarter Mile

12.6 sec

13.6 sec

Speed in 1/4 Mile

115 MPH

105 MPH

For more instantaneous acceleration and better engine flexibility in any gear, the S Class’ engines produce their peak torque and horsepower at lower RPM’s than the A8:



S550 5.5 DOHC V8

6000 RPM

2800 RPM

S600 5.5 turbo V12

5000 RPM

1800 RPM

S65 6.0 turbo V12

5500 RPM

2000 RPM

A8 4.2 DOHC V8

6800 RPM

3500 RPM

A8 L W12 6.0 DOHC 12 cyl.

6200 RPM

4000 RPM

Brakes and Stopping Comparison

The S Class stops much shorter than the A8:

S Class


80 to 0 MPH

215 feet

219 feet

Road & Track

70 to 0 MPH

162 feet

183 feet

Car and Driver

60 to 0 MPH

113 feet

119 feet

Motor Trend

Suspension and Handling Comparison

The S Class offers an available adjustable active suspension system, which counteracts cornering forces actively, limiting body roll and improving handling and stability. Audi doesn’t offer an active suspension on the A8.

For a smoother ride and more stable handling, the S Class’ wheelbase is 3.6 inches longer than on the A8 L. The S Class’ wheelbase is 8.7 inches longer than on the A8.

The S Class’ front to rear weight distribution is more even (51.3% to 48.7%) than the A8’s (56% to 44%). This gives the S Class more stable handling and braking.

The S550 handles at .85 G’s, while the A8 L W12 pulls only .79 G’s of cornering force in a Car and Driver skidpad test.

Passenger Space Comparison

Because it has more passenger and cargo room, the S Class is rated a Large car by the EPA, while the A8 is rated a Mid-size.

The S Class has 9.1 cubic feet more passenger volume than the A8 (109.4 vs. 100.3).

The S Class has .5 inches more front headroom, .5 inches more front legroom, .5 inches more rear headroom, 4.7 inches more rear legroom and 1.2 inches more rear shoulder room than the A8.

For the ultimate in rear passenger comfort, the S Class’ optional rear seats recline. The A8 doesn’t offer reclining rear seats.

Cargo Capacity Comparison

The S Class has a much larger trunk than the A8 (16.3 vs. 14.6 cubic feet).

Ergonomics Comparison

If the windows are left down on the S Class the driver can raise them all using the keyless remote (remote must be aimed at door sensor); on a hot day the driver can lower the windows. The driver of the A8 can’t use the remote to operate the windows.

To improve comfort and visibility, the S Class has standard pull-out visor extensions that block glare better. The A8 doesn’t offer extendable visors.

A power rear sun shade is standard on the S Class to help block heat and glare for the rear passengers. A sunshade costs extra on the A8.

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