Lexus TX vs Mercedes-Benz GLB-Class: Specs Compared
Also searched as Mercedes-Benz GLB-Class vs Lexus TX specs — both orientations show this same side-by-side comparison.
The Lexus TX is the more efficient of the two: it reaches 29 mpg combined versus 28 mpg for the Mercedes-Benz GLB-Class, a 1 mpg advantage and costs about $100 less per year to fuel.
Across 5 measured categories, the Lexus TX leads in 4. Figures are EPA test data, not manufacturer claims.
2024–2026
Lexus TX
Standard Sport Utility Vehicle 4WD · 10 configurations
2020–2026
Mercedes-Benz GLB-Class
Small Sport Utility Vehicle 4WD · 20 configurations
Head-to-head specifications
| Metric | Lexus TX | Mercedes-Benz GLB-Class |
|---|---|---|
| Best combined MPG | 29 mpg ✓ | 28 mpg |
| Best city MPG | 29 mpg ✓ | 25 mpg |
| Best highway MPG | 28 mpg | 33 mpg ✓ |
| Lowest annual fuel costEPA estimate at 15,000 miles per year | $2,600 ✓ | $2,700 |
| Lowest CO2 output | 120 g/mi ✓ | 311 g/mi |
| Engines offered | SIDI & PFI, SIDI & PFI; Hybrid, SIDI & PFI; PHEV | SIDI; Mild Hybrid, SIDI |
| Transmissions | Automatic (S8), Automatic (S6), Automatic (AV-S6) | Automatic (AM8) |
| Drivetrains | All-Wheel Drive, Front-Wheel Drive | Front-Wheel Drive, All-Wheel Drive, 4-Wheel Drive |
| Fuel types | Premium, Premium and Electricity | Premium |
| EPA class | Standard Sport Utility Vehicle 4WD | Small Sport Utility Vehicle 4WD |
| Years covered | 2024–2026 | 2020–2026 |
| Configurations on record | 10 | 20 |
Source: EPA fuel economy records via fueleconomy.gov. Best-case values across all recorded configurations for each model.
Lexus TX vs Mercedes-Benz GLB-Class dimensions and size
The Lexus TX is 20.9 inches longer than the Mercedes-Benz GLB-Class on a wheelbase 4.7 inches longer, and 870.8 lbs heavier. At over 200 inches, the larger of the two is past the comfortable limit of a standard 192-inch single garage bay once you allow walking room.
| Dimension | Lexus TX (2026) | Mercedes-Benz GLB-Class (2026) | Difference |
|---|---|---|---|
| Length | 203.2 in | 182.3 in | 20.9 in |
| Width (excl. mirrors) | 78.3 in | 72 in | 6.3 in |
| Height | 70.1 in | 66.5 in | 3.5 in |
| Wheelbase | 116.1 in | 111.4 in | 4.7 in |
| Curb weight | 4,630 lbs | 3,759 lbs | 871 lbs |
Width excludes mirrors; add 8–12 inches for mirrors out. Figures are for the newest model year on record for each vehicle. See both drawn to scale.
Lexus TX vs Mercedes-Benz GLB-Class: what the numbers mean
Running cost over five years: at the EPA's 15,000-mile-a-year assumption the Lexus TX burns about $2,600 of fuel annually against $2,700 for the Mercedes-Benz GLB-Class. That $100 yearly gap compounds to roughly $500 over five years and $800 over eight — often more than the price difference between two trims of the same vehicle, and the single largest running-cost line item separating these two.
City versus highway split: the Lexus TX is the stronger commuter at 29 mpg city, while the Mercedes-Benz GLB-Class pulls ahead on the interstate at 33 mpg highway. If most of your driving is stop-and-go traffic the city figure is the one to weigh; for long-distance highway mileage the reverse is true, and the two vehicles effectively swap places depending on how you drive.
Powertrain choice: the Lexus TX is recorded with 3 distinct engine configurations (SIDI & PFI, SIDI & PFI; Hybrid, SIDI & PFI; PHEV), the Mercedes-Benz GLB-Class with 2 (SIDI; Mild Hybrid, SIDI). Across 10 recorded Lexus TX configurations and 20 for the Mercedes-Benz GLB-Class, the wider the engine spread the more the real-world fuel efficiency depends on which version you actually buy, so check the specific model year and drivetrain rather than the headline number.
Drivetrain and class: the Lexus TX is offered with All-Wheel Drive, Front-Wheel Drive, the Mercedes-Benz GLB-Class with Front-Wheel Drive, All-Wheel Drive, 4-Wheel Drive. All-wheel drive typically costs one to two mpg combined against the same vehicle in front- or rear-wheel drive, which is worth remembering when the gap between these two is small. The EPA classes them as Standard Sport Utility Vehicle 4WD and Small Sport Utility Vehicle 4WD respectively — the class drives the interior volume, cargo space and passenger space each one is measured against.
Tailpipe emissions: at their cleanest configurations the Lexus TX emits 120 g/mile of CO2 versus 311 g/mile for the Mercedes-Benz GLB-Class. Emissions track fuel consumption almost exactly, so the cleaner vehicle here is also the cheaper one to fuel.
TX vs GLB-Class: common questions
Which is better on gas, the Lexus TX or the Mercedes-Benz GLB-Class?
The Lexus TX is the more efficient of the two: it reaches 29 mpg combined versus 28 mpg for the Mercedes-Benz GLB-Class, a 1 mpg advantage and costs about $100 less per year to fuel.
Which costs less to run per year?
By EPA estimates at 15,000 miles a year, the Lexus TX runs about $2,600 a year in fuel at its most efficient configuration, versus about $2,700 for the Mercedes-Benz GLB-Class — a difference of roughly $100 per year.
What engines do the TX and GLB-Class offer?
Lexus TX: SIDI & PFI, SIDI & PFI; Hybrid, SIDI & PFI; PHEV. Mercedes-Benz GLB-Class: SIDI; Mild Hybrid, SIDI.
Are they in the same vehicle class?
The EPA classifies the Lexus TX as Standard Sport Utility Vehicle 4WD and the Mercedes-Benz GLB-Class as Small Sport Utility Vehicle 4WD, so they aren't a like-for-like match on size.
More TX comparisons
More GLB-Class comparisons
Comparison id: lexus-tx-vs-mercedes-benz-glb-class