2025 Audi S3 vs 2025 Mercedes-Benz C-Class
Comparison Overview
Deciding between the athletic punch of the 2025 Audi S3 and the refined presence of the 2025 Mercedes-Benz C-Class comes down to prioritizing outright performance versus everyday practicality. Buyers often grapple with whether the S3's exhilarating 328 hp is worth sacrificing cargo space, given the C-Class offers a substantial 11.6 cu ft versus the S3's tight 8.3 cu ft. Furthermore, the C-Class pulls ahead in efficiency, achieving a combined 29 MPG compared to the S3's 26 MPG, despite both demanding premium fuel. While the S3 is slightly more compact at 177.4 inches long, the C-Class boasts a significantly wider stance at 74.4 inches. This comparison pits Audi's focused aggression against Mercedes-Benz's slightly more mature, efficient daily usability for an initial MSRP of nearly the same price point ($48,700 for the S3 vs. $48,450 for the C-Class).
Size Comparison
Performance
Fuel Efficiency
Full Specifications
Our Verdicts
2025 Mercedes-Benz C-Class
The 2025 Mercedes-Benz C-Class wins for commuting due to its better fuel economy, offering 29 combined MPG versus the S3's 26 combined MPG.
2025 Mercedes-Benz C-Class
The Mercedes-Benz C-Class is better for families because it provides superior cargo capacity at 11.6 cu ft compared to the Audi S3's 8.3 cu ft.
2025 Audi S3
The 2025 Audi S3 clearly appeals more to driving enthusiasts with its significant power advantage of 328 hp over the C-Class's 255 hp.
2025 Mercedes-Benz C-Class
The C-Class offers better overall utility and efficiency while costing $250 less at the base MSRP.
Choose the Audi S3 if...
- You crave rapid acceleration and superior power figures, leveraging the S3's 328 hp output.
- You prefer the sure-footed confidence provided by Audi's standard all-wheel drive system.
- You need a slightly shorter vehicle, as the S3 measures only 177.4 inches long.
Choose the Mercedes-Benz C-Class if...
- Your primary goal is maximizing utility, as the C-Class boasts 11.6 cu ft of cargo space.
- You prioritize efficiency on the highway, where the C-Class achieves 35 MPG.
- You prefer the traditional feel and gear ratio spread of a 9-speed shiftable automatic transmission.
Key Dimensions
| Dimension | Audi S3 | Mercedes-Benz C-Class |
|---|---|---|
| Length | 177.4" | 187.0" |
| Width | 71.5" | 74.4" |
| Height | 55.7" | 56.6" |
| Wheelbase | 103.6" | 112.8" |
Features Comparison
Safety
| Feature | Audi | Mercedes-Benz |
|---|---|---|
| Blind Spot Monitor | ✓ | ✓ |
| Lane Departure Warning | ✓ | — |
| Rear Cross Traffic Alert | ✓ | — |
| Pre-Collision Safety System | ✓ | ✓ |
| Post-Collision Safety System | ✓ | ✓ |
| Dual Front Side-Mounted Airbags | ✓ | ✓ |
| Dual Rear Side-Mounted Airbags | ✓ | — |
| Front Head Airbags | ✓ | ✓ |
| Rear Head Airbags | ✓ | ✓ |
| Passenger Airbag Occupant Sensing Deactivation | ✓ | ✓ |
| Electronic Stability Control | ✓ | ✓ |
| Traction Control System | ✓ | ✓ |
| LATCH System | ✓ | ✓ |
| Rear Door Child Safety Locks | ✓ | ✓ |
| Anti-lock Brakes (ABS) | 4-Wheel | 4-Wheel |
| Front Ventilated Disc Brakes | ✓ | ✓ |
| Rear Ventilated Disc Brakes | ✓ | ✓ |
| Brake Assist | ✓ | ✓ |
| Tire Pressure Monitoring System | ✓ | ✓ |
| Automatic Headlights | ✓ | ✓ |
| LED Headlights | ✓ | ✓ |
| Daytime Running Lights | ✓ | ✓ |
| Headlight Washers | ✓ | — |
| Integrated Turn Signal Mirrors | ✓ | ✓ |
| Front Headrests | 2 | 2 |
| Front Fixed Headrests | ✓ | — |
| Rear Headrests | 3 | 3 |
| Rear Height Adjustable Headrests | ✓ | ✓ |
| Rear Center 3-Point Seatbelt | ✓ | ✓ |
| Anti-Theft Alarm System (Remote) | ✓ | ✓ |
| Engine Immobilizer | ✓ | ✓ |
| Driver Attention Alert | — | ✓ |
| Brake Drying | — | ✓ |
| Brake Preparation System | — | ✓ |
| Headlight Delay-Off | — | ✓ |
| Front Power Adjustable Headrests | — | ✓ |
Engine
| Feature | Audi | Mercedes-Benz |
|---|---|---|
| Base Engine Displacement | 2.0 L | 2.0 L |
| Number of Cylinders | inline 4 | inline 4 |
| Base Engine Type | gas | mild hybrid |
| Horsepower | 328 hp | 255 hp @ 5800 rpm |
| Torque | 295 lb-ft | 295 lb-ft @ 2000 rpm |
| Number of Valves | 16 | 16 |
| Camshaft Type | Double overhead cam (DOHC) | Double overhead cam (DOHC) |
| Variable Valve Timing | Variable | Variable |
| Fuel Injection Type | ✓ | ✓ |
Drive Train
| Feature | Audi | Mercedes-Benz |
|---|---|---|
| Transmission Type | 7-speed automated manual | 9-speed shiftable automatic |
| Drivetrain Type | all wheel drive | rear wheel drive |
| Center Differential Type | Limited Slip | — |
Fuel
| Feature | Audi | Mercedes-Benz |
|---|---|---|
| Fuel Type | premium unleaded (required) | premium unleaded (required) |
| EPA Fuel Economy (City/Highway) | 23/31 MPG | 25/35 MPG |
| EPA Fuel Economy (Combined) | 26 MPG | 29 MPG |
| EPA Driving Range (City/Highway) | 333.5/449.5 mi. | 435.0/609.0 mi. |
| Fuel Tank Capacity | 14.5 gal. | 17.4 gal. |
Comfort & Convenience
| Feature | Audi | Mercedes-Benz |
|---|---|---|
| Push Button Start | ✓ | ✓ |
| Tilt and Telescopic Steering Wheel | ✓ | — |
| Transmission Controls on Steering Wheel | ✓ | ✓ |
| Audio Controls on Steering Wheel | ✓ | ✓ |
| Electric Power Steering | ✓ | ✓ |
| Rear View Camera | ✓ | ✓ |
| Front Parking Sensors | ✓ | ✓ |
| Rear Parking Sensors | ✓ | ✓ |
| Driver Assisted Parking Assist | ✓ | — |
| Cruise Control | ✓ | ✓ |
| Front Cupholders | ✓ | ✓ |
| Rear Cupholders | ✓ | ✓ |
| Front Door Pockets | ✓ | ✓ |
| Rear Door Pockets | ✓ | ✓ |
| Front Seatback Storage | ✓ | ✓ |
| Leather Steering Wheel | ✓ | ✓ |
| Three Zone Climate Control | ✓ | — |
| Rear Ventilation Ducts | ✓ | ✓ |
| Interior Air Filtration | ✓ | ✓ |
| Dual Vanity Mirrors | ✓ | ✓ |
| Turn Signal Indicators in Mirrors | ✓ | ✓ |
| Power Tilt and Telescopic Steering Wheel | — | ✓ |
| Cruise Control on Steering Wheel | — | ✓ |
| Automatic Parking Assist | — | ✓ |
| Wireless Charging Pad | — | ✓ |
| Universal Remote Transmitter | — | ✓ |
| Dual Zone Climate Control | — | ✓ |
| Auto-Dimming Rearview Mirror | — | ✓ |
In Car Entertainment
| Feature | Audi | Mercedes-Benz |
|---|---|---|
| Infotainment Display | 10.1 in | 11.9 in |
| AM/FM Stereo | ✓ | ✓ |
| Speaker System | 6 | 5 |
| Android Auto (Wireless) | ✓ | ✓ |
| Apple CarPlay (Wireless) | ✓ | ✓ |
| USB Port | ✓ | ✓ |
| USB Port with External Media Control | ✓ | ✓ |
| Subwoofer Count | — | 1 |
| Satellite Radio | — | ✓ |
| Satellite Radio Trial Period | — | 6 months |
Power Feature
| Feature | Audi | Mercedes-Benz |
|---|---|---|
| One-Touch Power Windows | 4 | 4 |
| Moonroof Type | 1st Row Power Glass Extended | 1st Row Power Glass |
| Remote Keyless Entry | ✓ | — |
| Heated Mirrors | ✓ | ✓ |
| Keyless Entry | — | ✓ |
Frontseats
| Feature | Audi | Mercedes-Benz |
|---|---|---|
| Front Head Room | 36.8 in. | 40.0 in. |
| Front Leg Room | 41.2 in. | 41.7 in. |
| Front Shoulder Room | 54.8 in. | 56.3 in. |
| Seat Material: Leather/Sueded Microfiber | ✓ | — |
| Front Seat Type: Sport | ✓ | — |
| Driver Seat Power Adjustments | 8-way | 10-way |
| Driver Seat Height Adjustment | ✓ | ✓ |
| Driver Seat Lumbar Support | Power | Power |
| Passenger Seat Power Adjustments | 8-way | 10-way |
| Passenger Seat Height Adjustment | ✓ | ✓ |
| Passenger Seat Lumbar Support | Power | Power |
| Driver Seat Heating | Multi-level | Multi-level |
| Passenger Seat Heating | Multi-level | Multi-level |
| Seat Material: Leatherette | — | ✓ |
| Front Seat Type: Bucket | — | ✓ |
| Driver Seat Thigh Extension | — | ✓ |
| Driver Seat Memory Settings | — | 3 |
| Passenger Seat Memory Settings | — | 3 |
Rearseats
| Feature | Audi | Mercedes-Benz |
|---|---|---|
| Rear Head Room | 36.6 in. | 37.5 in. |
| Rear Leg Room | 35.2 in. | 36.0 in. |
| Rear Shoulder Room | 53.0 in. | 55.6 in. |
| Split-Folding Rear Seatback | ✓ | ✓ |
| Folding Rear Seat Feature | ✓ | — |
| Pass-Thru Center Armrest | ✓ | — |
| Folding Center Armrest | — | ✓ |
Tires and Wheels
| Feature | Audi | Mercedes-Benz |
|---|---|---|
| Wheel Material | Alloy | Alloy |
| Wheel Diameter | 18 in | — |
| Tire Size | 225/40R18 | 245/40R18 |
| Run Flat Tires | ✓ | ✓ |
| Wheel Size | — | 18 x 8.5 in |
Suspension
| Feature | Audi | Mercedes-Benz |
|---|---|---|
| Four-Wheel Independent Suspension | ✓ | ✓ |
| Front Stabilizer Bar | ✓ | ✓ |
| Rear Stabilizer Bar | ✓ | ✓ |
Warranty
| Feature | Audi | Mercedes-Benz |
|---|---|---|
| Basic Warranty | 4 yr./ 50000 mi. | 4 yr./ 50000 mi. |
| Drivetrain Warranty | 4 yr./ 50000 mi. | 4 yr./ 50000 mi. |
| Corrosion/Rust Warranty | 12 yr./ unlimited mi. | 4 yr./ 50000 mi. |
| Roadside Assistance | 4 yr./ unlimited mi. | 4 yr./ 50000 mi. |
| Hybrid Component Warranty | — | 6 yr./ 62000 mi. |
Frequently Asked Questions
Common questions about comparing the 2025 Audi S3 and 2025 Mercedes-Benz C-Class.
What is the biggest performance difference between the 2025 Audi S3 and the 2025 Mercedes-Benz C-Class?
The biggest difference lies in horsepower; the Audi S3 outputs a punchy 328 hp, giving it a 73 hp advantage over the Mercedes-Benz C-Class, which produces 255 hp.
Does the difference in fuel economy matter for these premium sedans?
Yes, although both require premium fuel, the C-Class is measurably thriftier, achieving 29 combined MPG compared to the S3's 26 combined MPG.
Which car is inherently better for carrying luggage or strollers?
The Mercedes-Benz C-Class is significantly better for cargo needs, offering 11.6 cu ft of trunk space, while the Audi S3 is quite limited at only 8.3 cu ft.
Are the MSRPs significantly different between the S3 and C-Class?
Not at all; the starting prices are nearly identical, with the Audi S3 listed at $48,700 and the Mercedes-Benz C-Class priced slightly lower at $48,450.
What does the difference in drive type mean for typical driving conditions?
The Audi S3 uses all-wheel drive (AWD), which is great for poor weather grip, whereas the C-Class utilizes rear-wheel drive (RWD), usually preferred for sharper, more balanced handling dynamics on dry roads.
Is the difference in size noticeable between these two sedans?
The Mercedes-Benz C-Class is noticeably larger, being 177.0 inches long versus the Audi S3's 177.4 inches, and substantially wider at 74.4 inches compared to the S3's 71.5 inches.
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