2025 Mercedes-Benz C-Class C 300 4MATIC vs 2025 Audi A4 Premium Plus S line
22 more lb-ft torque vs $1,850 less. That is the real fork. Key numbers: 255 vs 261 hp, 27 vs 26 MPG.
The C-Class C 300 4MATIC leads on 22 more lb-ft torque. The A4 Premium Plus S line leads on $1,850 less. The spec table compares 5 specifications head to head.
Key Differences at a Glance
What's Actually Different
These two vehicles differ in 5 specifications.
Full Specification Comparison
Specifications and pricing reflect available data as of early 2026 and may not match current manufacturer figures. Always confirm details with an authorized dealer before making a purchase decision.
| Spec | 2025 Mercedes-Benz C-Class C 300 4MATIC | 2025 Audi A4 Premium Plus S line |
|---|---|---|
| Pricing | ||
| MSRP | $50,450 | $48,600 |
| Powertrain | ||
| Engine | 2.0L I4 mild-hybrid Turbo | 2.0L I4 mild-hybrid Turbo |
| Horsepower | 255 hp | 261 hp |
| Torque | 295 lb-ft | 273 lb-ft |
| Transmission | 9-speed shiftable automatic | 7-speed automated manual |
| Drivetrain | AWD | AWD |
| Fuel Economy | ||
| City MPG | 24 | 23 |
| Highway MPG | 33 | 32 |
| Combined MPG | 27 | 26 |
| Fuel Tank | 17.4 gal | 15.3 gal |
| Dimensions | ||
| Curb Weight | 3,957 lbs | 3,682 lbs |
| Wheelbase | 112.8" | 111.0" |
| Length | 187.0" | 187.5" |
| Width | 74.4" | 72.7" |
| Height | 56.6" | 56.2" |
| Safety | ||
| NHTSA Overall | No published data | 5/5 stars |
| IIHS Award | TSP+ | No published data |
| Warranty | ||
| Bumper-to-Bumper | 4yr/50k | 4yr/50k |
| Powertrain | 4yr/50k | 4yr/50k |
| Corrosion | 4yr/50k | 12yr/unlimited |
| Roadside Assistance | 4yr/50k | 4yr/unlimited |
Frequently Asked Questions
What is the price difference between the 2025 Mercedes-Benz C-Class C 300 4MATIC and 2025 Audi A4 Premium Plus S line?
The 2025 Audi A4 Premium Plus S line starts at $48,600, $1,850 less than the 2025 Mercedes-Benz C-Class C 300 4MATIC at $50,450. On a 60-month loan that is roughly $32/month. All prices are MSRP before destination and dealer fees.
Who should choose the 2025 Mercedes-Benz C-Class C 300 4MATIC?
The 2025 Mercedes-Benz C-Class C 300 4MATIC is the stronger pick when lower running costs matter to you, roughly $59/year less on fuel.
Who should choose the 2025 Audi A4 Premium Plus S line?
The 2025 Audi A4 Premium Plus S line is the stronger pick when you want to keep $1,850 in your pocket and the 2025 Audi A4 Premium Plus S line covers your needs.
Which gets better fuel economy, the 2025 Mercedes-Benz C-Class C 300 4MATIC or 2025 Audi A4 Premium Plus S line?
The 2025 Mercedes-Benz C-Class C 300 4MATIC rates 27 combined MPG, 1 MPG ahead.
Which is more powerful, the 2025 Mercedes-Benz C-Class C 300 4MATIC or 2025 Audi A4 Premium Plus S line?
The 2025 Audi A4 Premium Plus S line produces 261 hp, 6 more than the 2025 Mercedes-Benz C-Class C 300 4MATIC at 255 hp. The 2025 Mercedes-Benz C-Class C 300 4MATIC also leads in torque at 295 lb-ft vs 273 lb-ft.
Is the 2025 Mercedes-Benz C-Class C 300 4MATIC bigger than the 2025 Audi A4 Premium Plus S line?
The 2025 Audi A4 Premium Plus S line is 0.5″ longer at 187.5″ vs 187.0″. The 2025 Mercedes-Benz C-Class C 300 4MATIC has a 1.8″ longer wheelbase, which typically means more rear-seat legroom.
How do the warranties compare?
Both offer similar warranty coverage: 4yr/50k bumper-to-bumper and 4yr/50k powertrain.
Explore more: Mercedes-Benz trims, Mercedes-Benz C-Class trims, Audi trims, Audi A4 trims
C-Class vs A4: What This Matchup Is Really About
The 2025 Mercedes-Benz C-Class C 300 4MATIC and 2025 Audi A4 Premium Plus S line are both compact cars competing for the same buyer. Price, fuel economy, and daily comfort are the tie-breakers. The $-1,850 gap is about $32/month on a 60-month loan. Noticeable but not dramatic enough to be the deciding factor on its own.
Under the Hood
Both run the same 2.0L I4 mild-hybrid Turbo engine. The 6 hp difference (261 vs 255) is marginal in daily driving. Both use AWD.
Running Costs: C-Class vs A4
The 2025 Mercedes-Benz C-Class C 300 4MATIC saves roughly $59/year on fuel at $3.50/gallon and 12,000 annual miles. Over five years, that is $295.
Bottom Line
Choose the 2025 Mercedes-Benz C-Class C 300 4MATIC when lower running costs matter to you, roughly $59/year less on fuel. Choose the 2025 Audi A4 Premium Plus S line when you want to keep $1,850 in your pocket and the 2025 Audi A4 Premium Plus S line covers your needs.
Specifications shown combine licensed third-party automotive data with official manufacturer, EPA, and NHTSA source material. Actual pricing, features, and availability may vary by region and dealer. Always confirm details with an authorized dealer before making a purchase decision. TrimAtlas is not affiliated with Mercedes-Benz or Audi or any dealership.