Certified Benz & Beemer Compares 2014 Mercedes Benz C-Class VS 2014 Audi A4 Near Scottsdale, AZ

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2014 Mercedes Benz C-Class

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2014 Audi A4

Safety Comparison

The C-Class Sedan’s optional front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The A4 doesn’t offer pre-crash pretensioners.

For enhanced safety, the front and rear seat shoulder belts of the Mercedes C-Class Sedan 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 Audi A4 has only front height-adjustable seat belts.

The Insurance Institute for Highway Safety tests front crash prevention systems. With a score of 5 points, IIHS rates the PRE-SAFE Brake optional in the C-Class Sedan as “Superior.” The A4 scores only 3 points, and is rated only “Basic.”

The C-Class Sedan’s optional lane departure warning system alerts a temporarily inattentive driver when the vehicle begins to leave its lane and gently nudges the vehicle back towards its lane. The A4 doesn’t offer a lane departure warning system.

The C-Class Sedan offers optional Parktronic™ to help warn the driver about vehicles, pedestrians or other obstacles behind or in front of their vehicle. The A4 doesn’t offer a front parking aid.

The C-Class Sedan’s 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 A4 doesn’t offer a driver alert monitor.

The C-Class Sedan has standard mbrace, which uses a global positioning satellite (GPS) receiver and a cellular system to get turn-by-turn 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 A4 doesn’t offer a GPS response system, only a navigation computer with no live response for emergencies, so if you’re involved in an accident and you’re incapacitated help may not come as quickly.

Both the C-Class Sedan and the A4 have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front and rear seatbelt pretensioners, height-adjustable front shoulder belts, plastic fuel tanks, traction control and electronic stability systems to prevent skidding.

The National Highway Traffic Safety Administration does side impact tests on new vehicles. In this test, which crashes the vehicle into a flat barrier at 38.5 MPH and into a post at 20 MPH, results indicate that the Mercedes C-Class Sedan is safer than the Audi A4:

C-Class Sedan


Front Seat


5 Stars

4 Stars




Chest Movement

.6 inches

1.4 inches

Abdominal Force

88 G’s

253 G’s

Rear Seat


5 Stars

5 Stars

Spine Acceleration

54 G’s

71 G’s

Into Pole


5 Stars

5 Stars

Max Damage Depth

16 inches

20 inches

New test not comparable to pre-2011 test results. More stars = Better. Lower test results = Better.

Warranty Comparison

There are over 18 percent more Mercedes dealers than there are Audi dealers, which makes it easier should you ever need service under the C-Class Sedan’s warranty.

Reliability Comparison

J.D. Power and Associates’ 2013 Initial Quality Study of new car owners surveyed provide the statistics that show that Mercedes vehicles are better in initial quality than Audi vehicles. J.D. Power ranks Mercedes 11th in initial quality, above the industry average. With 2 more problems per 100 vehicles, Audi is ranked 13th.

J.D. Power and Associates’ 2013 survey of the owners of three-year-old vehicles provides the long-term dependability statistics that show that Mercedes vehicles are more reliable than Audi vehicles. J.D. Power ranks Mercedes fifth in reliability, above the industry average. With 32 more problems per 100 vehicles, Audi is ranked 23rd.

Engine Comparison

The C300 Sedan’s standard 3.5 DOHC V6 produces 28 more horsepower (248 vs. 220) than the A4’s 2.0 turbo 4 cyl. The C350 Sedan’s standard 3.5 DOHC V6 produces 82 more horsepower (302 vs. 220) and 15 lbs.-ft. more torque (273 vs. 258) than the A4’s 2.0 turbo 4 cyl.

Fuel Economy and Range Comparison

In heavy traffic or at stoplights the C300/C350 Sedan’s engine automatically turns off when the vehicle is stopped, saving fuel and reducing pollution. The engine is automatically restarted when the driver gets ready to move again. (Start/Stop isn’t accounted in present EPA fuel mileage tests.) The A4 doesn’t offer an automatic engine start/stop system.

The C-Class Sedan has 1.3 gallons more fuel capacity than the A4 (17.4 vs. 16.1 gallons), for longer range between fill-ups.

Brakes and Stopping Comparison

The C-Class Sedan’s standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs on the A4 are solid, not vented.

The C-Class Sedan stops much shorter than the A4:

C-Class Sedan


70 to 0 MPH

162 feet

166 feet

Car and Driver

60 to 0 MPH

106 feet

123 feet

Motor Trend

60 to 0 MPH (Wet)

141 feet

148 feet

Consumer Reports

Suspension and Handling Comparison

The C-Class Sedan has a standard continuously variable suspension system. Using sensors on steering angle, speed and other driver inputs, the shocks soften to improve ride, or stiffen when appropriate to aid handling on tricky roads. The A4’s suspension doesn’t offer adjustable shock absorbers.

The C-Class Sedan’s front to rear weight distribution is more even (52.4% to 47.6%) than the A4’s (55.8% to 44.2%). This gives the C-Class Sedan more stable handling and braking.

The C250 Sedan handles at .90 G’s, while the A4 2.0T Quattro pulls only .83 G’s of cornering force in a Car and Driver skidpad test.

The C350 Sedan executes Motor Trend’s “Figure Eight” maneuver 1.5 seconds quicker than the A4 2.0T Quattro (26.1 seconds @ .71 average G’s vs. 27.6 seconds @ .62 average G’s).

For better maneuverability, the C-Class Sedan’s turning circle is 2.4 feet tighter than the A4’s (35.3 feet vs. 37.7 feet).

Chassis Comparison

The C-Class Sedan is 4.3 inches shorter than the A4, making the C-Class Sedan easier to handle, maneuver and park in tight spaces.

The design of the Mercedes C-Class Sedan amounts to more than styling. The C-Class Sedan has an aerodynamic coefficient of drag of .27 Cd. That is significantly lower than the A4 (.31) and many sports cars. A more efficient exterior helps keep the interior quieter and helps the C-Class Sedan get better fuel mileage.

Passenger Space Comparison

The C-Class Sedan has .2 inches more front headroom, .4 inches more front legroom and .7 inches more rear shoulder room than the A4.

Ergonomics Comparison

Unlike the driver-only memory seat and mirrors optional in the A4, the C-Class Sedan offers an optional driver and passenger memory, so that when drivers switch, the memory setting adjusts the driver’s seat, steering wheel position and outside mirror angle and the front passenger seat also adjusts to the new passenger’s preset preferences.

The C-Class Sedan’s optional easy entry system raises the steering wheel when the door is unlocked or the ignition is switched off, making it easier for the driver to get in and out. The A4 doesn’t offer an easy entry system.

If the windows are left down on the C-Class Sedan the driver can raise them all using the key in the outside lock cylinder or the keyless remote (remote must be aimed at door sensor); on a hot day the driver can lower the windows. The driver of the A4 can’t use the remote to operate the windows.

Keyless-Go optional on the C-Class Sedan allows you to unlock the doors, trunk and start the engine all without removing a key from pocket or purse. This eliminates searching for keys before loading groceries, getting in the vehicle in bad weather or making a hurried start to your trip. The Audi A4’s available Audi Advanced Key doesn’t unlock the trunk.

While driving with high beams on, sensitive light sensors available for the C-Class Sedan detect other vehicles which could be blinded and automatically switch to low beams. The A4 doesn’t offer automatic dimming high beams.

To shield the driver and front passenger’s vision over a larger portion of the windshield and side windows, the C-Class Sedan has standard extendable sun visors. The A4 doesn’t offer extendable visors.

The C-Class Sedan has a standard dual zone air conditioning allows the driver and front passenger to choose two completely different temperatures so people with different temperature preferences won’t have to compromise. This makes both the driver and front passenger as comfortable as possible. Dual zone air conditioning costs extra on the A4.

Optional Mercedes-Benz Apps for the C-Class Sedan allows the driver and passengers access to select programs on their smartphones, including finding fuel prices at nearby service stations, searching the internet and other connected activities without taking their eyes off the road or their hands from the wheel. The A4 doesn’t offer factory integrated smartphone program access.

Economic Advantages Comparison

According to The Car Book by Jack Gillis, the C-Class Sedan is less expensive to operate than the A4 because typical repairs cost less on the C-Class Sedan than the A4, including $83 less for a water pump, $13 less for front brake pads, $10 less for a starter and $133 less for fuel injection.

Recommendations Comparison

Consumer Reports® chose the Mercedes C-Class Sedan as its “Top Pick,” the highest scoring vehicle in its category, based on reliability, safety and performance. The Audi A4 isn't recommended.

Motor Trend performed a comparison test in its May 2012 issue and they ranked the Mercedes C250 Sedan higher than the Audi A4 2.0T Quattro.

The Mercedes C-Class outsold the Audi A4/S4 by over two to one during 2013.

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