Certified Benz & Beemer Compares 2016 Mercedes Benz S-Class VS 2016 BMW 6 Near Phoenix, AZ

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2016 Mercedes Benz S-Class

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VS

2016 BMW 6

Safety Comparison

For enhanced safety, the front and rear seat shoulder belts of the Mercedes S-Class have pretensioners to tighten the seatbelts and eliminate dangerous slack in the event of a collision and force limiters to limit the pressure the belts will exert on the passengers. The BMW 6 Series Gran Coupe doesn’t offer pretensioners for the rear seat belts.

For enhanced safety, the front seat shoulder belts of the Mercedes S-Class are height-adjustable to accommodate a wide variety of driver and passenger heights. A better fit can prevent injuries and the increased comfort also encourages passengers to buckle up. The BMW 6 Series Gran Coupe doesn’t offer height-adjustable seat belts.

The S-Class has standard front and rear seat side-impact airbags and head airbags, which act as a forgiving barrier between the passengers and the door. Combined with high-strength steel door beams this system increases protection from broadside collisions. The 6 Series Gran Coupe doesn't offer rear-seat side-impact airbags, only ones for front seat occupants.

The rear seatbelts optional on the S-Class inflate when a collision is detected, helping to spread crash forces over a much larger area of the body and limiting head and neck movement. This can help prevent spinal and internal injuries. The 6 Series Gran Coupe doesn’t offer inflatable seatbelts.

The S-Class’ driver alert monitor detects an inattentive driver then sounds a warning and suggests a break. According to the NHTSA, drivers who fall asleep cause about 100,000 crashes and 1500 deaths a year. The 6 Series Gran Coupe doesn’t offer a driver alert monitor.

Both the S-Class and the 6 Series Gran Coupe have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras, available night vision systems, lane departure warning systems, blind spot warning systems and around view monitors.

Reliability Comparison

J.D. Power and Associates’ 2015 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Mercedes vehicles are more reliable than BMW vehicles. J.D. Power ranks Mercedes 7th in reliability, above the industry average. With 27 more problems per 100 vehicles, BMW is ranked 18th.

Engine Comparison

The S-Class has more powerful engines than the 6 Series Gran Coupe:

Horsepower

Torque

S550e 3.0 turbo V6 hybrid

436 HP

479 lbs.-ft.

S550 4.7 turbo V8

449 HP

516 lbs.-ft.

S600 5.5 turbo V12

523 HP

612 lbs.-ft.

S63 AMG 5.5 turbo V8

577 HP

664 lbs.-ft.

S65 AMG 6.0 turbo V12

621 HP

738 lbs.-ft.

640i Gran Coupe 3.0 turbo 6 cyl.

315 HP

330 lbs.-ft.

650i Gran Coupe 4.4 turbo V8

445 HP

480 lbs.-ft.

Alpina B6 4.4 turbo V8

540 HP

540 lbs.-ft.

M6 Gran Coupe 4.4 turbo V8

552 HP

502 lbs.-ft.

M6 Gran Coupe Competition Package 4.4 turbo V8

592 HP

500 lbs.-ft.

As tested in Car and Driver the S550 4.7 turbo V8 is faster than the 640i Gran Coupe 3.0 turbo 6 cyl. (automatics tested):

S-Class

6 Series Gran Coupe

Zero to 60 MPH

4.9 sec

5.6 sec

Zero to 100 MPH

11.5 sec

15.1 sec

5 to 60 MPH Rolling Start

5.2 sec

6.4 sec

Quarter Mile

13.4 sec

14.3 sec

Speed in 1/4 Mile

108 MPH

97 MPH

Fuel Economy and Range Comparison

On the EPA test cycle the S-Class RWD gets better fuel mileage than the 6 Series Gran Coupe RWD:

S-Class

6 Series Gran Coupe

n/a

15 city/22 hwy

4.4 twin turbo V8 (552 HP)/Manual

4.7 twin turbo V8/7-spd. Auto

17 city/26 hwy

17 city/25 hwy

4.4 twin turbo V8 (445 HP)/Auto

The S550e can drive on battery power alone for up to 18.6 miles. The 6 Series Gran Coupe must run its internal combustion engine to move.

The S-Class has 2.6 gallons more fuel capacity than the 6 Series Gran Coupe’s standard fuel tank (21.1 vs. 18.5 gallons), for longer range between fill-ups.

Brakes and Stopping Comparison

For better stopping power the S-Class’ brake rotors are larger than those on the 6 Series Gran Coupe:

S550

S63/S65

640i/650i

M6 w/Carbon Brakes

Front Rotors

14.6 inches

16.5 inches

13.7 inches

16.1 inches

Rear Rotors

14.2 inches

14.1 inches

13.6 inches

15.6 inches

The S-Class stops shorter than the 6 Series Gran Coupe:

S-Class

6 Series Gran Coupe

70 to 0 MPH

167 feet

170 feet

Car and Driver

Tires and Wheels Comparison

For better traction and acceleration, the S-Class has larger standard rear tires than the 6 Series Gran Coupe (275/35R20 vs. 245/45R18).

Suspension and Handling Comparison

The front and rear suspension of the S-Class uses air springs for a smoother, controlled ride than the 6 Series Gran Coupe, which uses coil springs. Air springs maintain proper ride height and ride more smoothly.

The S-Class has a standard automatic front and rear load leveling suspension to keep ride height level with a heavy load or when towing. The 6 Series Gran Coupe doesn’t offer a load leveling suspension.

The S-Class’ drift compensation steering can automatically compensate for road conditions which would cause the vehicle to drift from side to side, helping the driver to keep the vehicle straight more easily. The 6 Series Gran Coupe doesn’t offer drift compensation steering.

For a smoother ride and more stable handling, the S-Class’ wheelbase is 7.9 inches longer than on the 6 Series Gran Coupe (124.6 inches vs. 116.7 inches).

Chassis Comparison

The design of the Mercedes S-Class amounts to more than styling. The S-Class offers aerodynamic coefficients of drag from .27 to .28 Cd (depending on bodystyle and options). That is lower than the 6 Series Gran Coupe (.3 to .33) and many sports cars. A more efficient exterior helps keep the interior quieter and helps the S-Class get better fuel mileage.

As tested by Car and Driver while cruising at 70 MPH, the interior of the S550 is quieter than the 640i Gran Coupe (67 vs. 69 dB).

Passenger Space Comparison

Because it has more passenger and cargo room, the S-Class is rated a Large car by the EPA, while the 6 Series Gran Coupe is rated a Compact.

The S-Class has 15 cubic feet more passenger volume than the 6 Series Gran Coupe (112 vs. 97).

The S-Class has 3 inches more front shoulder room, 2.2 inches more rear headroom, 7.7 inches more rear legroom and 4.5 inches more rear shoulder room than the 6 Series Gran Coupe.

For enhanced passenger comfort on long trips the S-Class’ available rear seats recline. The 6 Series Gran Coupe’s rear seats don’t recline.

Cargo Capacity Comparison

The S-Class has a much larger trunk than the 6 Series Gran Coupe with its rear seat up (16.3 vs. 12 cubic feet).

To make loading and unloading groceries and cargo easier, especially for short adults or children, the S-Class has a standard power trunk, which opens and closes automatically by pressing a button, or optionally by just kicking your foot under the back bumper, completely leaving your hands free. The 6 Series Gran Coupe doesn’t offer a power trunk.

Ergonomics Comparison

Heated windshield washer fluid is standard on the S-Class to defrost the washer nozzles and quickly clear ice and frost from the windshield without scraping. The 6 Series Gran Coupe doesn’t offer heated windshield washer fluid.

To better shield the driver and front passenger’s vision, the S-Class has standard dual-element sun visors that can block glare from two directions simultaneously. The 6 Series Gran Coupe doesn’t offer secondary sun visors.

To shield the driver and front passenger’s vision over a larger portion of the windshield and side windows, the S-Class has standard extendable sun visors. The 6 Series Gran Coupe doesn’t offer extendable visors.

Optional air-conditioned front and rear seats keep the S-Class’ passengers comfortable and take the sting out of hot leather in Summer. The 6 Series Gran Coupe doesn’t offer air-conditioned seats in the rear.

The S-Class has a 115-volt a/c outlet on the center console, allowing you to recharge a laptop or run small household appliances without special adapters that can break or get misplaced. The 6 Series Gran Coupe doesn’t offer a house-current electrical outlet.

Recommendations Comparison

The Mercedes S-Class won two awards in Kiplinger’s 2015 car issue. The BMW 6 Series Gran Coupe didn't win any award.

Strategic Vision rates overall owner satisfaction with vehicle quality. The Mercedes S-Class is ranked first in the Luxury Car category. The BMW 6 Series Gran Coupe is ranked below average. The S-Class received the 2015 “Total Quality Award.”

The S-Class was chosen as one of Automobile Magazine’s “All Stars” for 3 of the last 16 years. The 6 Series hasn’t been picked since 2005.

The Mercedes S-Class outsold the BMW 6 Series by over three to one during the 2015 model year.

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