“The interior is the star of this vehicle. It has a good balance between the spartan interior of a Tesla and the all out circus of buttons and screens of a BMW, etc. The exterior has a fun retro feel. The standard features make it a great value when compared with other vehicles in its class.”
2021 Mercedes-Benz GLB: What's New, Specs & Features
Last updated August 4, 2026
The biggest 2021 Mercedes-Benz GLB change is that Blind Spot Assist with Exit Warning becomes standard. The GLB 250 models otherwise carry over, while the new AMG GLB 35 broadens the model range.
About the 2021 Mercedes-Benz GLB
1st generation (X247), second model year; introduced for 2020.
Mercedes-Benz positions the GLB as the compact SUV for people who want a small footprint without giving up usefulness. The 2021 brochure leans on the idea that it is "compact" but lets you "live large," which fits its upright shape, roomy cabin, sliding rear seat, strong cargo flexibility, and optional third row. Compared with sportier small luxury SUVs, the GLB sells practicality first: easy access, family-friendly space, and modern voice-controlled tech in a boxier, more usable package.
The GLB 250 remains the front-wheel-drive entry model, with a 221-hp turbo engine, a tall cabin, and sliding and reclining rear seats for added flexibility. The GLB 250 4MATIC adds all-wheel drive and programming for slick or uneven roads. Both have a touchscreen system with voice control, Apple CarPlay, and Android Auto.
What changed, by category
Powertrain
The new AMG GLB 35 performance model joins the range. The GLB 250 and GLB 250 4MATIC retain their 221-hp turbo four-cylinder engine and eight-speed dual-clutch automatic transmission.
Safety
Blind Spot Assist with Exit Warning becomes standard on the GLB 250 and GLB 250 4MATIC.
Tech
The touchscreen, navigation system, and satellite radio move from optional to standard equipment.
2021 Mercedes-Benz GLB specs and features by trim
| Feature | ||
|---|---|---|
| Engine | 4-Cyl, Turbo, 2.0 Liter | 4-Cyl, Turbo, 2.0 Liter |
| Transmission | Automatic, 8-Spd Dual-Clutch | Automatic, 8-Spd Dual-Clutch |
| Drivetrain | FWD | AWD |
| Fuel Type | Gas | Gas |
| MPG City | 23 mpg | 23 mpg |
| MPG Highway | 31 mpg | 30 mpg |
| Horsepower | 221 hp | 221 hp |
| Torque | 258 lb-ft | 258 lb-ft |
| Trunk/Cargo | 22 cu-ft | 22 cu-ft |
| Rear Legroom | 29.1 in | 29.1 in |
| Seats | 7 | 7 |
| Doors | 4 | 4 |
| Alarm System | ||
| Automatic High Beams | ||
| Blindspot Sensors | ||
| Lane Departure Warning | ||
| Park Assist | ||
| Rear View Camera | ||
| 360 Camera | ||
| Alloy Wheels | ||
| Fog Lights | ||
| LED Headlights | ||
| Panorama Moon Roof | ||
| Rear Spoiler | ||
| Roof Rails | ||
| Navigation System | ||
| Premium Audio | ||
| Smartphone Interface | ||
| Dual-Zone Climate Control | ||
| Heated Front Seats | ||
| Heated Steering Wheel | ||
| Leather Seats | ||
| Proximity Keyless Entry | ||
| Remote Start | ||
| Third Row Seat | ||
| Ventilated Front Seats | ||
Frequently asked questions
What is the biggest change to the 2021 Mercedes-Benz GLB?
The biggest change is standard Blind Spot Assist with Exit Warning on the GLB 250 and GLB 250 4MATIC. The new AMG GLB 35 also joins the model range.
Was the 2021 Mercedes-Benz GLB redesigned?
No. The 2021 GLB is the second model year of the first generation, so it keeps the basic design introduced for 2020.
Did the 2021 Mercedes-Benz GLB 250 get a new engine?
No. The 2021 GLB 250 and GLB 250 4MATIC keep the 221-hp 2.0-liter turbo four-cylinder engine and eight-speed dual-clutch automatic transmission used for 2020.
Does the 2021 Mercedes-Benz GLB have standard blind-spot monitoring?
Yes. Blind Spot Assist with Exit Warning is standard on the 2021 GLB 250 and GLB 250 4MATIC.
What technology became standard on the 2021 Mercedes-Benz GLB?
The touchscreen, navigation system, and satellite radio became standard equipment for 2021 rather than optional equipment.
2021 Mercedes-Benz GLB Reviews
What owners are saying about the 2021 Mercedes-Benz GLB.
4.1
2021 Mercedes-Benz GLB
(538 reviews)
“Just do it. It's such a great car! It makes you feel special driving it. I love the interior and the 3rd row seats are awesome.”
“I love the safety features and the luxury it offers. I can almost fully customize the interior with the different screen options and ambient lighting. I can't say that I hate anything about this vehicle. She drives beautifully and has great acceleration. So much fun to drive.”