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2018 Audi S6 Overview, Reviews, Ratings & Specs

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Cathleen V | March 31, 2025
The 2018 Audi S6 is a performance-oriented mid-size sedan, building upon the successful A6 platform. Its sleek four-door body style offers a blend of luxury and sporty driving dynamics. The S6 has been around since the mid-1990s, and the 2018 model represents a later iteration of the C7 generation. Key trims include the Premium Plus and Prestige. The original MSRP ranged from approximately $72,000 to $78,000. It's popular for its potent engine, quattro all-wheel drive, and upscale interior.
The Good

The 2018 Audi S6 offers impressive performance from its powerful V8 engine, providing exhilarating acceleration. Its comfortable and luxurious interior appeals to those seeking a refined driving experience. The quattro all-wheel-drive system enhances handling and safety in various weather conditions. While not the most fuel-efficient, it offers a good balance of power and relative efficiency compared to rivals. Its sophisticated design and available advanced technology also add to its appeal.

The Bad

Potential weaknesses of the 2018 Audi S6 include higher maintenance costs compared to non-performance vehicles. Some owners have reported issues with the infotainment system and related electronics. Fuel economy is not its strongest suit. Carbon buildup on the valves of the engine can be a concern over time, requiring cleaning. Prospective buyers should also check for any oil leaks and ensure that all scheduled maintenance has been performed.

2018 Audi S6: Quick Overview

Key specifications for the 2018 Audi S6:

  • Engine: 4.0-liter twin-turbocharged V8
  • Horsepower: 450 hp
  • Torque: 406 lb-ft
  • Transmission: 7-speed S tronic dual-clutch automatic
  • Fuel Economy (EPA estimated): 18 mpg city / 27 mpg highway / 21 mpg combined
  • 0-60 mph: Approximately 4.4 seconds
  • Towing Capacity: Not recommended/Not officially rated

Trim-Level Features:
  • Premium Plus:
    • LED headlights
    • Navigation system
    • Audi connect services
    • Bose surround sound system
    • Blind-spot monitoring
    • Power-adjustable steering column
    • Heated front seats
    • Audi pre sense basic and rear
  • Prestige (adds to Premium Plus):
    • Head-up display
    • Corner view camera system
    • Power soft-closing doors
    • Heated rear seats
    • Ventilated front seats
    • Full LED headlights
    • Adaptive cruise control
    • Active lane assist
Both trims include quattro all-wheel drive, sport-tuned suspension, and performance brakes.

2018 Audi S6 Specifications

Vehicle Information
Year 2018
Make Audi
Model S6
Trim -
Style -
Type Sedan
Category Mid-Size Car
Manufacturing Details
Made In Germany
Manufacturing City NECKARSULM
Dimensions
Doors 4-Door
Curb Weight -
Gross Vehicle Weight Rating -
Overall Height -
Overall Length -
Overall Width -
Wheelbase Length -
Standard Seating 5
Engine & Performance
Engine 4 8
Engine Size 4L
Engine Cylinders 8
Transmission 7-Speed Automatic
Transmission Type Automatic
Transmission Speeds 7-Speed
Drivetrain All-Wheel Drive
Additional Features
Anti-Brake System Standard
Steering Type -
Pricing
Manufacturer Suggested Retail Price (MSRP) $71,900 USD
Invoice Price $66,868 USD
Delivery Charges $975 USD

Vehicle History Report

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What Problems Does the 2018 Audi S6 Have?

Frequently reported problems for the 2018 Audi S6 can include issues with the infotainment system, such as freezing or slow response times. Some owners have reported problems with the MMI (Multi Media Interface) system. Oil consumption can be a concern in some cases, requiring regular monitoring. Carbon buildup on the intake valves is a known issue for direct-injection engines like the one in the S6, which can lead to reduced performance over time. This often requires manual cleaning. There have been some reported issues with the turbocharger system in certain instances, although this is less common.

Recalls for the 2018 Audi S6, if any, would be specific to that model year and can be checked through the NHTSA (National Highway Traffic Safety Administration) website using the VIN.

Long-term reliability concerns often revolve around the complexity of the vehicle's electronics and the potential for failures in the advanced driver-assistance systems. Regular maintenance, especially oil changes and inspections for leaks, is crucial for maintaining the longevity of the engine and drivetrain. The dual-clutch transmission (S tronic) generally proves reliable, but proper maintenance, including fluid changes, is essential.

How long will the 2018 Audi S6 last?

The 2018 Audi S6, with proper maintenance, can easily reach 150,000 miles or more. Many owners report enjoying the car for 10+ years with diligent upkeep. Long-term durability largely depends on adherence to the recommended service schedule. Weaknesses over time can include suspension component wear, particularly bushings and dampers, as well as potential issues with the turbochargers and the aforementioned carbon buildup. Regular fluid changes and inspections are vital. The complex electronics may also exhibit glitches or failures as the car ages, necessitating specialized repairs.

What Technology & Safety Features are Included?

The 2018 Audi S6 boasts a range of advanced technology features. The standard infotainment system includes Audi's MMI interface with navigation, smartphone integration (Apple CarPlay and Android Auto), and a Bose surround sound system. Driver-assistance features include standard blind-spot monitoring and Audi pre sense basic and rear, which can detect imminent collisions and prepare the car and occupants.

Optional features include adaptive cruise control, active lane assist, a head-up display, a corner-view camera system, and night vision assist. The Prestige trim adds many of these features as standard equipment.

Safety features encompass a suite of airbags, anti-lock brakes, electronic stability control, and traction control.

Crash-test ratings from the NHTSA (National Highway Traffic Safety Administration) and IIHS (Insurance Institute for Highway Safety) should be checked for the 2018 model year to get a comprehensive understanding of its safety performance. Generally, Audi vehicles score well in crash tests, but it’s important to confirm the specific ratings for the 2018 S6.

What Colors Options are Available?

Exterior Colors
Brilliant Black
Ibis White
Glacier White Metallic
Mythos Black Metallic
Floret Silver Metallic
Tornado Gray Metallic
Navarra Blue Metallic
Misano Red Pearl Effect
Arras Red Metallic
Interior Colors
Black interior
Nougat Brown interior
Arras Red interior

2018 Audi S6 Prices and Market Value

The 2018 Audi S6 had a starting MSRP in the low $70,000s when new. Current used market prices typically range from the mid $30,000s to the low $40,000s, depending on mileage, condition, and trim level. Depreciation is significant in the first few years but tends to level off. Factors affecting resale value include the car's overall condition, maintenance history, mileage, and whether it has desirable options such as the Prestige trim or specific driver-assistance packages. Lower mileage and a clean vehicle history report command higher prices.

2018 Audi S6 Cost of Ownership

The 2018 Audi S6 is considered a costly vehicle to own long-term. Insurance premiums are higher due to its performance capabilities. Fuel costs are also above average, given the V8 engine's thirst. Maintenance and repair costs can be significant, especially for specialized components like the turbochargers and dual-clutch transmission. Regular maintenance, while crucial, adds to the expense. Unexpected repairs can be pricey due to the car's complex systems and the cost of Audi parts.

2018 Audi S6 Fuel Efficiency

Fuel Type Gasoline (Required)
Fuel Capacity -
City Mileage 6.8 km/l
Highway Mileage 10.2 km/l

2018 Audi S6 Safety Rating

NHTSA
Overall Rating
Overall Frontal Star Rating
Side Overall Star Rating
Overall Rollover Star Rating
Combined Front Seat Rating
Combined Rear Seat Rating
Overall Frontal Star Rating
Frontal Barrier Star Ratings Not Tested
Overall Side Star Rating
Side Barrier Star Ratings
Side Pole Star Rating
Combined Side Barrier And Side Pole Star Ratings Not Tested
Rollover Resistance Star Rating

2018 Audi S6 Recalls & Defects

AIR Bags:sensor:occupant Classification
Recall date 2018-06-04
Recall no. 18v370000
Source NHTSA
Summary Volkswagen Group OF America, Inc. (Volkswagen) IS Recalling Certain 2013-2018 Audi S6 and S7, 2012-2018 A7 and A6 Sedan, and 2014-2018 RS7 Vehicles Equipped With Basic Seats (With or Without Heating). Stress or Wear OF THE Body-sensing MAT Within THE Front Passenger Seat MAY Cause THE Passenger Occupant Detection System (pods) Control Module TO Malfunction.
Consequence IF THE Pods Module Malfunctions, THE Front Passenger AIR BAG MAY NOT Deploy Properly IN THE Event OF A Crash, Increasing THE Risk OF Injury.
Remedy Volkswagen Will Notify Owners, and Dealers Will Install A Pods System Repair Kit, Free OF Charge. THE Recall Began November 29, 2018. Owners MAY Contact Audi Customer Service AT 1-800-253-2834. Volkswagen's Number FOR This Recall IS 74d5.
Notes Owners MAY Also Contact THE National Highway Traffic Safety Administration Vehicle Safety Hotline AT 1-888-327-4236 (Tty 1-800-424-9153), or GO TO Www.safercar.gov.

2018 Audi S6 Insurance

Insurance for a 2018 Audi S6 is moderately priced, reflecting its status as a Sedan with strong safety ratings and
reasonable repair costs.

How Does the 2018 Audi S6 Compare to Other Sedan?

The 2018 Audi S6 competes with vehicles like the BMW 550i/M550i, Mercedes-AMG E43/E53, and Cadillac CTS V-Sport. In terms of performance, the S6 offers competitive acceleration and handling. The BMW and Mercedes models often provide slightly sharper handling, while the Cadillac delivers more aggressive styling. Feature-wise, the S6 is well-equipped, but the Mercedes-Benz offers a more luxurious interior and advanced technology. Reliability is a mixed bag; Audi's reliability ratings are typically average, while BMW and Mercedes also have their share of issues. Price-wise, the S6 is generally in line with its German rivals.

A similar alternative would be the BMW 550i/M550i, offering comparable performance and luxury. A potentially 'better' alternative, depending on priorities, might be the Mercedes-AMG E43/E53, known for their luxurious interiors and refined driving experience. However, the choice depends on individual preferences regarding styling, brand loyalty, and driving dynamics. The Cadillac CTS V-Sport represents a strong domestic competitor with a focus on performance and value.

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Final Verdict: Is the 2018 Audi S6 a Good Sedan?

The 2018 Audi S6 is ideal for buyers seeking a blend of performance, luxury, and all-weather capability. It's well-suited for those who appreciate a sporty sedan with a sophisticated interior and advanced technology. Whether it's worth buying depends on individual budget and tolerance for potential maintenance costs. A used 2018 S6 can be a good value, especially if a thorough inspection reveals a well-maintained example. Opting for a Prestige trim can be worthwhile for the added features. However, prospective buyers should be prepared for higher ownership costs compared to less performance-oriented vehicles and prioritize a pre-purchase inspection.

2018 Audi S6 Owner Reviews

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Cathleen V

Cathleen is an exceptional freelance writer covering hot topics in the automotive world from a gearhead's perspective. Her articles delve into various aspects of automotive technology and history, offering readers detailed insights into engine performance, reliability, and maintenance. Through her engaging and informative writing, Cathleen provides valuable information to automotive enthusiasts and consumers alike, helping them make informed decisions about vehicle maintenance and purchases.