What Fits in the 2027 Mercedes-Benz GLB With the Seats Folded?
October 13 2026,
Packing for a family trip to a cottage or squeezing in a week’s worth of groceries tests any SUV. For Quebec shoppers weighing family-friendly luxury EVs, the real question is not the spec sheet, it is whether the load area actually works when the back seat is full of kids and gear.
The 2027 GLB answers that with a cargo system built around three configurations rather than one fixed number. Understanding how those configurations shift is the difference between guessing and knowing what fits.
What the GLB’s Cargo System Is
The GLB is a three-row SUV, standard with seating for five and optional seating for seven. Behind the rear seats, the trunk holds 540 L of cargo space (480 L when the optional third row is fitted). Fold the second row flat and that number grows to 1,715 L (1,605 L with the seven-seat layout).
A 127 L front storage compartment adds a separate, secure space up front. This is not a replacement for the trunk. It is a spot for items you want kept apart from the main load, like a laptop bag or a cooler.
How the Folding and Loading Works
The second row backrests fold in a 40/20/40 split as standard, so long items like skis can pass through the centre while two passengers stay seated on either side. An optional sliding second row is also available on five-seat models, and it comes included when the third row is selected.
That sliding seat moves up to 140 mm and reclines in stages, which lets you trade passenger legroom for up to 140 L of extra cargo space on the fly. When the optional third row is not in use, those seats fold flush into the load floor, and the five-seat model’s height-adjustable floor can be raised for smaller items or lowered to maximize load height.
A longer Easy-Entry adjustment range and larger rear door openings make climbing into the third row easier for kids and adults, so folding those seats up or down for a weekend trip is not a wrestling match.
Cargo capacity at a glance
|
Configuration |
5-seat GLB |
7-seat GLB |
|
Behind rear seats |
540 L |
480 L |
|
Rear seats folded |
1,715 L |
1,605 L |
|
Behind front seats (frunk) |
127 L |
127 L |
Why This Matters for Real Family Life
With the rear seats up, the 540 L trunk covers a typical grocery run, hockey bags, or a double stroller without folding anything. That is the everyday state most owners will use most often.
Fold the seats down and the 1,715 L opens up for the bigger trips: family vacation luggage, bulk warehouse shopping, or outdoor gear like tents and coolers stacked together. Long, awkward items sit alongside soft duffel bags without needing to remove a seat entirely, since the 40/20/40 split keeps a pass-through open.
The seven-seat layout changes the math. With three kids or grandparents along, the trunk drops to 480 L behind the rear seats and 1,605 L folded. That is still generous, but it means families who regularly need both seating and storage should think about which trips call for all seven seats versus which ones call for maximum cargo.
The 127 L frunk is a quieter but useful piece of this puzzle. It keeps wet boots, a phone charger, or valuables away from the main cargo area, which matters on Quebec winter days when the trunk is loaded with slush-covered gear and you still want somewhere dry and out of sight.
Who Benefits Most From This Layout
Families who split time between daily errands and occasional big hauls get the most out of the sliding second row. Choosing between passenger space and 140 L of extra cargo on demand means the GLB flexes to the trip instead of forcing a compromise.
Buyers who need occasional third-row seating, carpooling, extra grandkids, weekend guests, gain real flexibility since those seats fold away completely when not needed. Anyone hauling long gear regularly, skis, flat-pack furniture, hardware store runs, benefits from the standard 40/20/40 split that keeps two rear passengers seated while cargo passes through the middle.
Buyers who rarely need the third row and prioritize maximum everyday trunk space should lean toward the five-seat configuration, where the 540 L and 1,715 L figures are the largest the GLB offers.
Making Sense of the GLB’s Storage for Your Household
The GLB’s cargo system is built around a straightforward tradeoff: seating capacity versus load volume, adjustable in stages rather than fixed. Whether you need five seats and maximum trunk room or seven seats for a bigger household, the layout adapts without forcing you to choose once and live with it.
Visit Mercedes-Benz Blainville in Mirabel to see the GLB’s seating and cargo configurations in person and find the layout that fits how your family actually packs.
