Parkers overall rating: 4 out of 5 4.0
  • Seven-seats as standard on almost all versions
  • Vast amounts of room for second row passengers
  • Suite of safety tech, plus more available as options

Up front, the Mercedes-Benz GLB delivers a spacious cabin area that drivers and passengers of all sizes should be able to get comfortable in. Storage space is also ample, thanks to large door pockets, a sizeable locker under the centre armrest, a place to put your phone forward of the centre console and a reasonably proportioned glovebox.

>> We rate the best seven-seater SUVs for 2020

All standard fare for a car of this size, yet it’s when you climb into the second-row seats that the GLB really begins to impress. The feeling of outright space is considerable – certainly far, far more than you get in the Mercedes-Benz A-Class with which it shares much of its underpinnings.

Footroom, kneeroom and legroom are all very generous and allow plenty of space for those in the outer rear seats. Of course, it’s not quite as generous as, for example, a Skoda Kodiaq, yet it feels much bigger than an Audi Q3.

The GLB’s second-row seats can also recline and slide forwards and backwards independently of one another, allowing greater legroom for those in the third-row seats in the case of the latter. Space in said seats is tight, but usable nonetheless. An average height male should be able to sit in relative comfort for around 30 minutes, however those any taller will find both head and legroom lacking. Climbing into the third row requires a certain amount of dexterity, too.

However, it’s important to note that in order to have any legroom in the third-row seats, the second-row bench must be slid forwards. This is the major differentiator from a larger seven-seat car, where those in the third row can be accommodated with little effect on those in the second.

Storage space in the back is workable, with large door pockets, nets behind the front seats, cupholders in the centre armrest and USB-C ports available. Meanwhile, those in the third row also get a small storage space on either side (with more USB-C connectivity) and cupholders in the middle. Isofix points are fitted as standard on the outer second row seats and third row seats.

As for bootspace, the GLB delivers a variety of measurements depending on whether you go for five or seven seats, and what configuration said seats are in. For example, opt for the latter, as most UK buyers will, and with all seats in place there’s 150 litres of luggage capacity on offer.

Fold the third-row of seats down and there’s 700 litres of space when loaded to the roof. Meanwhile, with both the third- and second-row seats down, 1680 litres become available. Measurements for the five-seat version are 770 litres with all seats in place and 1,805 litres with the second row down. Note that bootspace can also be increased depending on how far forward the second-row seat base and seat backs are adjusted.

How safe is the Mercedes-Benz GLB?

Given Mercedes' enviable safety record, it was no surprise that the GLB scored a full five-star rating when it was tested by Euro NCAP in 2019. This is because the GLB shares a platform with the A-Class and B-Class, both cars that have achieved the maximum score.

Standard safety equipment on the GLB includes:

  • Active Brake Assist (a form of autonomous emergency braking)
  • Active Bonnet (improves pedestrian safety)
  • Active Lane Keeping Assist
  • Attention Assist (monitors the driver for drowsiness)
  • Speed Limit Assist
  • Cruise control
  • eCall emergency call button (built in SOS button, also capable of automatically contacting emergency services and alerting them to the vehicle’s location in the event of a serious accident)
  • Four Isofix points (two on five-seat models)

The optional Driving Assistance Pack (also standard on AMG Line Premium Plus) includes:

  • Active Distance Assist Distronic (similar to adaptive cruise control)
  • Active Steer Assist in conjunction with Active Lane Change Assist (automatically changes lane when Distronic is activated)
  • Active Speed Limit Assist in conjunction with Traffic Sign Assist (recognises road signs and optionally adjust the speed limit accordingly) and route-based speed adjustment (for example, reduces speed when Distronic is activated and vehicle is approaching a roundabout)
  • Evasive Steering Assist (vehicle is capable of automatically performing an evasive manoeuvre)
  • Active Blindspot Assist
  • Pre-Safe Plus (capable of detecting imminent rear collisions and applying brakes to reduce risk of injury)

Watch: Mercedes-Benz GLB Euro NCAP crash test

Basic equipment

The basic equipment list includes equipment that is standard across all versions of the Mercedes-Benz GLB SUV.

  • 3x3 point rear seat belts
  • ABS
  • Alarm
  • Alloy wheels
  • Audio remote
  • Driver`s airbag
  • Electric mirrors
  • Front electric windows
  • Heated mirrors
  • Heated seats
  • Isofix child seat anchor points
  • PAS
  • Passenger`s airbag
  • Rear electric windows
  • Remote locking
  • Roof rails
  • Sat Nav
  • Service indicator
  • Side airbags
  • Steering wheel rake adjustment
  • Steering wheel reach adjustment
  • Traction control

Equipment by trim level

To view equipment options for a specific trim level, please select from the following list:

Equipment included on some trim levels
  • Cruise control
  • Electric driver`s seat
  • Electric passenger`s seat
  • Electric sunroof
  • Folding rear seats
  • Height adjustable drivers seat
  • Leather seat trim
  • Lumbar support
  • Parking sensors
  • Partial leather seat trim
  • Sports seats

AMG equipment

AMG standard equipment
  • Electric driver`s seat
  • Electric passenger`s seat
  • Electric sunroof
  • Leather seat trim
  • Lumbar support
  • Parking sensors
  • Sports seats
AMG optional equipment
None available

AMG Line equipment

AMG Line standard equipment
  • Partial leather seat trim
  • Sports seats
AMG Line optional equipment
  • Cruise control
  • Electric driver`s seat
  • Electric passenger`s seat
  • Electric sunroof
  • Folding rear seats
  • Height adjustable drivers seat
  • Lumbar support
  • Parking sensors

Sport equipment

Sport standard equipment
  • Cruise control
  • Height adjustable drivers seat
  • Partial leather seat trim
Sport optional equipment
None available

Euro NCAP Rating – 5 stars

The Mercedes-Benz GLB SUV was tested by Euro NCAP in 2019 and was awarded a 5 star overall rating. This overall rating is calculated from the following individual ratings:

5 star rating
Test 2019
Individual safety ratings
Adult Occupant: 92%
Child Occupant: 88%
Vulnerable Road Users: 78%
Safety Assist: 74%

Euro NCAP provides motoring consumers with a realistic and independent assessment of the safety performance of some of the most popular cars sold in Europe. The safety ratings are determined from a series of vehicle tests, designed and carried out by Euro NCAP. These tests represent, in a simplified way, important real life accident scenarios that could result in injured or killed car occupants or other road users.