Choosing between three of the most popular Mercedes-Benz SUVs can feel like a happy problem, and our team is here to make the decision simple. As your trusted Mercedes-Benz dealership near Morristown, we've broken down the 2026 Mercedes-Benz GLA vs. GLB vs. GLC so you can see how each model fits your lifestyle, budget and daily drive. Each SUV wears the same refined badge, yet they serve very different needs, so we'll help you find the one that feels like home.
Which Mercedes-Benz SUV Is Biggest?
The 2026 Mercedes-Benz GLC is the biggest of these SUVs, measuring 185.7 inches in length and 64.6 inches in height. Rather than maximizing passenger head count, the 2026 GLC dedicates every inch of its extended wheelbase to executive 2-row luxury. Rear passengers enjoy generous shoulder and legroom, while the cargo capacity reaches 56.3 cubic feet to allow for extra storage.
Settling in the middle of this comparison is the 2026 GLB, which reaches 182.4 inches in length, standing at 66.7 inches tall. Its rugged design rewards you with 62 cubic feet of max storage space. It also stands alone in this luxury tier by offering three rows of seating.
The 2026 Mercedes-Benz GLA is the most athletic and compact of the trio, measuring 173.6 inches in length with a sleek 63.5-inch height. Its swept-back roofline and minimal overhangs are engineered for downtown maneuvering, tight parking structures and sharp handling, while still offering up to 50.5 cubic feet of cargo space.
Compare Mercedes-Benz SUV Features & Performance
The digital experience is immediately distinct behind the wheel of each of these models. Both the 2026 GLA and 2026 Mercedes-Benz GLB in Kingsport feature a panoramic cockpit with dual 10.25-inch high-definition displays seamlessly mounted side by side. The 2026 GLC steps up to an executive layout, pairing an independent 12.3-inch digital gauge clusterwith an11.9-inch central touchscreen.
Efficiency remains a hallmark across all three. The 2026 GLA leads the group with an EPA-estimated 34 highway mpg, while the more upright 2026 GLB remains closely matched at 33 highway mpg. The larger, more powerful 2026 GLC returns a competitive 32 highway mpg, alongside an exclusive plug-in hybrid alternative that delivers over 54 miles of all-electric driving.
Searching for new AWD luxury SUVs near Morristown? Each of these models comes with available 4MATIC® all-wheel drive for confident, all-weather stability. When it comes to adventure, the 2026 GLC is a top pick thanks to its 3,500-pound tow rating. It's also the only option rated for towing.
2026 GLA vs. GLB vs. GLC Specs Breakdown
2026 Mercedes-Benz GLA
- Body Style: Subcompact SUV
- Horsepower & Torque (lb-ft): 221 / 258
- All-Wheel Drive: Available 4MATIC®
- Highway MPG: 34
- Seating Capacity: 5
- Overall Length (in.): 173.6
- Cargo Space (cu. ft.): 50.5
- Max Towing Capacity (lbs.): Not Rated
- Digital Cockpit Displays: Dual 10.25-in. Screens
2026 Mercedes-Benz GLB
- Body Style: Compact SUV
- Horsepower & Torque (lb-ft): 221 / 258
- All-Wheel Drive: Available 4MATIC®
- Highway MPG: 33
- Seating Capacity: 5 (7 optional)
- Overall Length (in.): 182.4
- Cargo Space (cu. ft.): 62.0
- Max Towing Capacity (lbs.): Not Rated
- Digital Cockpit Displays: Dual 10.25-in. Screens
2026 Mercedes-Benz GLC
- Body Style: Compact SUV
- Horsepower & Torque (lb-ft): 255 / 295
- All-Wheel Drive: Available 4MATIC®
- Highway MPG: 32
- Seating Capacity: 5
- Overall Length (in.): 185.7
- Cargo Space (cu. ft.): 56.3
- Max Towing Capacity (lbs.): 3,500
- Digital Cockpit Displays: 12.3-in Gauge + 11.9-in. Screen
2026 GLA vs. GLB vs. GLC: How to Choose
Think about how you'll use the SUV most. Pick the 2026 GLA for easy maneuverability and value, the 2026 GLB for versatile family space and the 2026 GLC for premium comfort and performance. Browse our new Mercedes-Benz inventory to compare trims and colors in person, and schedule a VIP test-drive so you can feel the differences for yourself. Our friendly sales team will walk you through every option with no pressure.
Buy a New Mercedes-Benz SUV in Kingsport, TN
Ready to compare the 2026 GLA, GLB and GLC side by side? Schedule a test-drive, value your trade-in and let our team help you drive home in the SUV that fits you best. Stop by our Kingsport Mercedes-Benz dealership or reach out online to get started. Have a question before you visit? Contact us and we'll point you to the perfect model.
Read More:
Mercedes-Benz SUV Comparison Frequently Asked Questions
Which Mercedes-Benz SUV is the biggest?
The 2026 Mercedes-Benz GLC is the largest SUV in this comparison, measuring 185.7 inches in length and 64.6 inches in height. The 2026 GLB measures 182.4 inches long and 66.7 inches high, while the sporty 2026 GLA is the most compact at 173.6 inches long and 63.5 inches high.
Which Mercedes-Benz SUV has 3 rows of seating?
The 2026 Mercedes-Benz GLB is the only SUV in this luxury lineup that offers an available third row, accommodating up to seven passengers. Both the 2026 GLA and 2026 GLC feature dedicated 2-row layouts designed to seat five passengers with maximum personal space.
Which Mercedes-Benz SUV has the most cargo space?
The 2026 Mercedes-Benz GLB provides the most maximum cargo volume of the three, offering up to 62.0 cubic feet of storage capacity. The 2026 GLC follows with up to 56.3 cubic feet of cargo room, while the agile 2026 GLA provides up to 50.5 cubic feet.
Can a 2026 Mercedes-Benz GLA, GLB or GLC tow a trailer?
Only the 2026 Mercedes-Benz GLC is rated for towing, delivering a maximum towing capacity of up to 3,500 pounds. The 2026 GLA and 2026 GLB are not rated for towing.
Which Mercedes-Benz SUV gets the best gas mileage?
The 2026 Mercedes-Benz GLA delivers the highest fuel economy among the three gas models, achieving an EPA-estimated 34 highway mpg. The 2026 GLB achieves 33 highway mpg, while the 2026 GLC offers 32 highway mpg alongside an available plug-in hybrid variant that delivers over 54 miles of all-electric driving.
Do the Mercedes-Benz GLA, GLB, and GLC come with all-wheel drive?
Yes, all three models offer available 4MATIC® all-wheel drive for enhanced grip, control and winter driving confidence.
