2025 Mercedes-Benz GLB-Class vs 2025 Subaru Ascent
Comparison Overview
Deciding between luxury refinement and practical capability often stumps buyers looking at compact crossovers. The 2025 Mercedes-Benz GLB-Class asks for a premium with an MSRP of $45,800, while the 2025 Subaru Ascent undercuts it significantly at $39,995, a difference of $5,805 right off the bat. The GLB offers superior fuel economy, netting 28 combined MPG versus the Ascent's 22 combined MPG, although the Mercedes demands premium fuel. Performance is a mixed bag; the Ascent boasts higher output with 260 hp compared to the GLB's 221 hp. Interestingly, despite the Ascent being significantly larger overall (196.8 inches long vs. 182.4 inches for the GLB), the Mercedes provides slightly more traditional cargo space at 22 cubic feet versus the Subaru's 17.8 cubic feet, presenting a real head-scratcher for efficiency-focused buyers.
Size Comparison
Performance
Fuel Efficiency
Full Specifications
Our Verdicts
2025 Mercedes-Benz GLB-Class
The GLB-Class is the clear choice for daily commuting due to its excellent 28 combined MPG efficiency.
2025 Subaru Ascent
The Subaru Ascent wins for families because it provides more overall size and comes standard with AWD for variable conditions.
2025 Subaru Ascent
The Ascent offers more muscle with 260 hp and 277 lb-ft of torque compared to the GLB's 221 hp.
2025 Subaru Ascent
The Ascent delivers higher power and AWD for $5,805 less than the base GLB-Class.
Choose the Mercedes-Benz GLB-Class if...
- You prioritize fuel efficiency for high-mileage driving, aiming for the 28 combined MPG rating.
- You prefer the prestige and refinement associated with the Mercedes-Benz badge.
- You need usable cargo space (22 cu ft) in a slightly more compact exterior footprint (182.4 inches long).
Choose the Subaru Ascent if...
- All-weather security is non-negotiable, given its standard All-Wheel Drive capability.
- You need higher output for passing power, thanks to its 260 horsepower engine.
- Staying under a $40,000 starting price is critical, as the Ascent begins at $39,995.
Key Dimensions
| Dimension | Mercedes-Benz GLB-Class | Subaru Ascent |
|---|---|---|
| Length | 182.4" | 196.8" |
| Width | 72.2" | 76.0" |
| Height | 66.7" | 71.6" |
| Wheelbase | 111.4" | 113.8" |
Features Comparison
Safety
| Feature | Mercedes-Benz | Subaru |
|---|---|---|
| Blind Spot Monitor | ✓ | ✓ |
| Driver Attention Alert | ✓ | — |
| Pre-Collision Safety System | ✓ | ✓ |
| Post-Collision Safety System | ✓ | ✓ |
| Dual Front 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 |
| Brake Drying | ✓ | — |
| Front Ventilated Disc Brakes | ✓ | ✓ |
| Rear Solid Disc Brakes | ✓ | — |
| Brake Preparation System | ✓ | — |
| Brake Assist | ✓ | ✓ |
| Tire Pressure Monitoring System | ✓ | ✓ |
| Automatic Headlights | ✓ | ✓ |
| Headlight Delay-Off | ✓ | ✓ |
| LED Headlights | ✓ | ✓ |
| Daytime Running Lights | ✓ | ✓ |
| Front Fog Lights | ✓ | — |
| Integrated Turn Signal Mirrors | ✓ | ✓ |
| Front Headrests | 2 | 2 |
| Front Height Adjustable Headrests | ✓ | ✓ |
| Rear Headrests | 3 | 2 |
| Rear Height Adjustable Headrests | ✓ | ✓ |
| Rear Center 3-Point Seatbelt | ✓ | — |
| Anti-Theft Alarm System (Remote) | ✓ | ✓ |
| Engine Immobilizer | ✓ | ✓ |
| Lane Departure Warning | — | ✓ |
| Lane Keeping Assist System | — | ✓ |
| Rear Cross Traffic Alert | — | ✓ |
| Rear Ventilated Disc Brakes | — | ✓ |
| Adaptive Headlights | — | ✓ |
| Self-Leveling Headlights | — | ✓ |
Engine
| Feature | Mercedes-Benz | Subaru |
|---|---|---|
| Base Engine Displacement | 2.0 L | 2.4 L |
| Number of Cylinders | inline 4 | flat 4 |
| Base Engine Type | mild hybrid | gas |
| Horsepower | 221 hp @ 5500 rpm | 260 hp @ 5600 rpm |
| Torque | 258 lb-ft @ 1800 rpm | 277 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 | Mercedes-Benz | Subaru |
|---|---|---|
| Transmission Type | 8-speed automated manual | continuously variable-speed automatic |
| Drivetrain Type | front wheel drive | all wheel drive |
| Center Differential Type | — | Limited Slip |
| Hill Descent Control | — | ✓ |
Fuel
| Feature | Mercedes-Benz | Subaru |
|---|---|---|
| Fuel Type | premium unleaded (required) | regular unleaded |
| EPA Fuel Economy (City/Highway) | 25/33 MPG | 20/26 MPG |
| EPA Fuel Economy (Combined) | 28 MPG | 22 MPG |
| EPA Driving Range (City/Highway) | 397.5/524.7 mi. | 386.0/501.8 mi. |
| Fuel Tank Capacity | 15.9 gal. | 19.3 gal. |
Comfort & Convenience
| Feature | Mercedes-Benz | Subaru |
|---|---|---|
| Push Button Start | ✓ | ✓ |
| Tilt and Telescopic Steering Wheel | ✓ | ✓ |
| Transmission Controls on Steering Wheel | ✓ | ✓ |
| Cruise Control on Steering Wheel | ✓ | ✓ |
| Audio Controls on Steering Wheel | ✓ | ✓ |
| Electric Power Steering | ✓ | ✓ |
| Rear View Camera | ✓ | ✓ |
| Front Parking Sensors | ✓ | — |
| Rear Parking Sensors | ✓ | ✓ |
| Driver Assisted Parking Assist | ✓ | — |
| Wireless Charging Pad | ✓ | — |
| Cruise Control | ✓ | — |
| Universal Remote Transmitter | ✓ | ✓ |
| Front Cupholders | ✓ | ✓ |
| Rear Cupholders | ✓ | ✓ |
| Front Door Pockets | ✓ | ✓ |
| Rear Door Pockets | ✓ | ✓ |
| Overhead Console with Storage | ✓ | ✓ |
| Front Seatback Storage | ✓ | ✓ |
| Leather Steering Wheel | ✓ | ✓ |
| Dual Zone Climate Control | ✓ | — |
| Rear Ventilation Ducts | ✓ | — |
| Interior Air Filtration | ✓ | ✓ |
| Dual Vanity Mirrors | ✓ | ✓ |
| Auto-Dimming Rearview Mirror | ✓ | ✓ |
| Turn Signal Indicators in Mirrors | ✓ | ✓ |
| Adaptive Cruise Control | — | ✓ |
| 3rd Row Cupholders | — | ✓ |
| Three Zone Climate Control | — | ✓ |
In Car Entertainment
| Feature | Mercedes-Benz | Subaru |
|---|---|---|
| Infotainment Display | 10.25 in | 11.6 in |
| AM/FM Stereo | ✓ | ✓ |
| Android Auto (Wireless) | ✓ | ✓ |
| Apple CarPlay (Wireless) | ✓ | ✓ |
| USB Port | ✓ | ✓ |
| USB Port with External Media Control | ✓ | ✓ |
| Satellite Radio | ✓ | ✓ |
| Satellite Radio Trial Period | 6 months | — |
| Speaker System | — | 6 |
| Auxiliary Audio Input | — | ✓ |
| Satellite Radio Trial Length | — | 4 months |
Power Feature
| Feature | Mercedes-Benz | Subaru |
|---|---|---|
| One-Touch Power Windows | 4 | 2 |
| Keyless Entry | ✓ | ✓ |
| Heated Mirrors | ✓ | ✓ |
Frontseats
| Feature | Mercedes-Benz | Subaru |
|---|---|---|
| Front Head Room | 40.7 in. | 41.2 in. |
| Front Leg Room | 41.1 in. | 42.2 in. |
| Front Shoulder Room | 55.9 in. | 61.1 in. |
| Seat Material: Leatherette | ✓ | — |
| Front Seat Type: Bucket | ✓ | ✓ |
| Driver Seat Power Adjustments | 8-way | 8-way |
| Driver Seat Height Adjustment | ✓ | ✓ |
| Driver Seat Lumbar Support | Power | — |
| Driver Seat Thigh Extension | ✓ | — |
| Driver Seat Memory Settings | 3 | — |
| Passenger Seat Power Adjustments | 8-way | — |
| Passenger Seat Height Adjustment | ✓ | — |
| Passenger Seat Lumbar Support | Power | — |
| Passenger Seat Thigh Extension | ✓ | — |
| Passenger Seat Memory Settings | 3 | — |
| Driver Seat Heating | Multi-level | Multi-level |
| Passenger Seat Heating | Multi-level | Multi-level |
| Front Hip Room | — | 57.8 in. |
| Seat Material: Cloth | — | ✓ |
| Passenger Seat Manual Adjustments | — | 4-way |
Rearseats
| Feature | Mercedes-Benz | Subaru |
|---|---|---|
| Rear Head Room | 39.3 in. | 40.0 in. |
| Rear Leg Room | 38.1 in. | 38.6 in. |
| Rear Shoulder Room | 54.9 in. | 60.3 in. |
| Split-Folding Rear Seatback | ✓ | ✓ |
| Reclining Rear Seats | ✓ | — |
| Folding Center Armrest | ✓ | ✓ |
| Rear Hip Room | — | 57.5 in. |
| Manual Folding Third Row Seat | — | ✓ |
Tires and Wheels
| Feature | Mercedes-Benz | Subaru |
|---|---|---|
| Wheel Material | Alloy | Alloy |
| Wheel Size | 18 x 7.5 in | 18 x 7.5 in |
| Tire Size | 235/55R18 | 245/60R |
| Run Flat Tires | ✓ | — |
| Tire Type | — | All Season |
| Spare Tire Type | — | Temporary |
| Spare Tire Location | — | Underbody Mounted |
Suspension
| Feature | Mercedes-Benz | Subaru |
|---|---|---|
| Four-Wheel Independent Suspension | ✓ | ✓ |
| Front Stabilizer Bar | ✓ | ✓ |
| Rear Stabilizer Bar | ✓ | ✓ |
Warranty
| Feature | Mercedes-Benz | Subaru |
|---|---|---|
| Basic Warranty | 4 yr./ 50000 mi. | 3 yr./ 36000 mi. |
| Drivetrain Warranty | 4 yr./ 50000 mi. | 5 yr./ 60000 mi. |
| Corrosion/Rust Warranty | 4 yr./ 50000 mi. | 5 yr./ unlimited mi. |
| Roadside Assistance | 4 yr./ 50000 mi. | 3 yr./ 36000 mi. |
Frequently Asked Questions
Common questions about comparing the 2025 Mercedes-Benz GLB-Class and 2025 Subaru Ascent.
Is the fuel cost difference between these two vehicles significant?
Yes, the difference is notable; the GLB achieves 28 combined MPG, meaning you'll stop for gas less often than in the Ascent's 22 combined MPG rating, though you must factor in the GLB's requirement for premium unleaded fuel.
Which crossover is better suited for hauling cargo?
The 2025 Mercedes-Benz GLB-Class technically offers more standard cargo space at 22 cubic feet compared to the Ascent's 17.8 cubic feet, even though the Ascent is the physically larger vehicle overall.
How does the mandatory fuel type impact long-term ownership?
The GLB requires premium unleaded, which is generally more expensive per gallon than the regular unleaded accepted by the Subaru Ascent, adding to the GLB's operating costs despite its slightly better mileage.
Is the performance gap between the 221 hp GLB and 260 hp Ascent noticeable?
While the Ascent has 39 more horsepower and 19 lb-ft more torque, drivers focused purely on luxury cruising might not notice, but the Ascent will feel more responsive during acceleration and merging.
Why choose the smaller Mercedes when the Subaru Ascent is nearly $6,000 cheaper?
Buyers choose the GLB for its premium interior feel, smaller dimensions (72.2 inches wide vs. 76.0 inches wide for the Ascent), and superior base fuel economy ratings.
Does the GLB offer All-Wheel Drive like the Subaru?
No, the base 2025 Mercedes-Benz GLB-Class comparison is listed with Front Wheel Drive, whereas the 2025 Subaru Ascent comes standard with its proven All-Wheel Drive system.
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