Audi A6 vs Mercedes-Benz C-Class

The 2022 Mercedes-Benz C-Class presented a stylish exterior that seamlessly integrated design elements from other Mercedes models. Its front end mirrored the CLA-Class with a distinctive droop, while the rear end and thin taillights were reminiscent of the S-Class. The result was a cohesive and recognizable Mercedes design, highlighted by a prominent grille featuring a large three-pointed star logo. The cab-rearward proportions, with a long hood and short rear deck, emphasized its rear-wheel-drive platform, setting it apart from the front-wheel-drive CLA-Class and A-Class. Standard LED headlights and taillights could be upgraded to the Digital Light system, which offered adaptive lighting features. Inside, the C-Class aimed to emulate the luxury of the S-Class with features like a freestanding touchscreen, intricate speaker grilles, and ambient lighting. Despite its luxury aspirations, the standard MBTex synthetic leather upholstery was a reminder of its price range, though Nappa leather was available on higher trims.

The 2026 Audi A6, while handsome, did not make a striking visual impression. Its design featured a lower, more pronounced "singleframe" grille and fender flares inspired by the Quattro rally car. The LED headlights offered a pixelated effect with programmable signatures, and the taillights were repositioned to accommodate programmable lights for different icons. The A6 was available in Premium, Premium Plus, and Prestige trims, with the S Line Black Optic Package adding sportier elements. The interior offered an Audi Exclusive Design Package with two-tone Nappa leather seats, but the overall materials felt bland and cheap, even in the top-spec Prestige models. The A6's design was more subdued compared to competitors like the Cadillac CT5 and BMW 5 Series, and it lacked the illuminated flair of the Mercedes-Benz E-Class.

The 2022 Mercedes-Benz C-Class featured a 2.0-liter turbocharged four-cylinder engine in the C300 model, producing 255 horsepower and 295 pound-feet of torque. It was paired with a nine-speed automatic transmission and a 48-volt mild-hybrid system, which added up to 20 hp and 148 lb-ft of torque in short bursts. The C300 could accelerate from zero to 60 mph in 5.9 seconds, with a top speed of 130 mph. A sportier Mercedes-AMG C43 version offered a more powerful 402 hp engine, reducing the zero to 60 mph time to 4.6 seconds and increasing the top speed to 155 mph. The C300 4Matic test car delivered sufficient power, but experienced turbo lag and occasional rough shifts. Despite these issues, the ride quality was luxurious, with muted impacts from road imperfections. The C-Class demonstrated good body control and precise steering on twisty roads, though it required deliberate effort to handle corners.

The 2026 Audi A6 was equipped with a turbocharged 3.0-liter V6 engine, producing 362 horsepower and 406 pound-feet of torque. This engine was paired with a seven-speed dual-clutch transmission and standard quattro all-wheel drive. The A6 could accelerate from zero to 60 mph in 4.5 seconds, outperforming base models of the BMW 5 Series and Mercedes E-Class. The transmission exhibited hesitation under heavy throttle, but shifts were smooth once up to speed. The A6's handling was enhanced by brake-based torque vectoring and an optional sport rear differential, which improved cornering. The Sport Plus Package included a steel-spring suspension for sportier handling, but at the cost of ride comfort. Rear-axle steering and a progressive steering rack contributed to the A6's stability and nimbleness, though the steering system felt artificially heavy in Dynamic mode. Overall, the A6 excelled on highways but was less suited for spirited driving on twisty roads.

The 2022 Mercedes-Benz C-Class was available only as a sedan, with increased dimensions compared to its predecessor. This resulted in more interior space, with front headroom increasing by 0.1 inch and rear headroom by 0.4 inch. Rear-seat legroom also increased by 0.8 inch, making the C-Class a leader in front-seat headroom and rear-seat legroom among its competitors. The seats were comfortable and supportive, though front legroom was limited. The C-Class offered excellent forward visibility, but thick rear pillars created blind spots. The trunk provided 17.9 cubic feet of space, with a wide opening for easy loading and a split-folding rear bench for longer items.

The 2026 Audi A6 was 2.4 inches longer than its predecessor, but the wheelbase remained unchanged, resulting in no significant increase in passenger space. Front-seat headroom increased by two inches due to the new panoramic glass roof, but rear-seat headroom and legroom remained similar. The A6 offered comparable space to the BMW 5 Series, with rear climate controls and USB-C ports. Heated and ventilated front seats were standard, with optional massaging sport seats. The trunk provided 13.5 cubic feet of space, slightly less than the previous generation, but more than the Cadillac CT5 and Mercedes E-Class. The A6 retained a conventional trunk design with split-folding rear seats for added versatility.

The 2022 Mercedes-Benz C-Class featured an infotainment system inspired by the S-Class, with a 12.3-inch digital instrument cluster and an 11.9-inch touchscreen angled toward the driver. Standard features included wireless Apple CarPlay and Android Auto, with a Burmester 3D surround-sound system available on higher trims. The MBUX infotainment system offered a "Zero Layer" setup, displaying multiple functions on the screen simultaneously. The voice recognition system was highly effective, and touch controls on the steering wheel were intuitive. An optional augmented-reality navigation system provided helpful visual cues for turns, enhancing the driving experience.

The 2026 Audi A6 introduced the Digital Stage setup, with an 11.9-inch digital instrument cluster and a 14.5-inch touchscreen. An optional 10.9-inch front-passenger touchscreen addressed the main screen's driver-oriented tilt. The MMI infotainment system was criticized for its oversimplified and hard-to-interpret layouts, though voice recognition and wireless Apple CarPlay and Android Auto were standard. Audi planned to update the interface mid-year, adding features like an integrated dashcam and a new steering wheel. The optional Bang & Olufsen 3D audio system featured headrest speakers for navigation directions, but the overall infotainment experience was lacking.

The 2022 Mercedes-Benz C-Class offered a comprehensive suite of advanced driver assistance systems (ADAS), with many features standard. These included automatic emergency braking, blind-spot monitoring, a driver-attention monitor, and Pre-Safe systems. Optional features included lane-keep assist, evasive steering assist, and adaptive cruise control. Car-to-X communication allowed vehicles to share information, providing warnings for potential hazards. Crash-test ratings from the IIHS and NHTSA were not available at the time of publication.

The 2026 Audi A6 came standard with a range of driver-assist features, including adaptive cruise control, forward-collision warning, and blind-spot monitors. Premium Plus and Prestige trims added park-assist, adaptive cruise assist, and a 360-degree camera system. The lane-centering feature allowed some wobbling within the lane, but robust driver monitoring was included. Crash-test ratings from the IIHS and NHTSA were not available at the time of writing.