Trunk comparison: Mercedes Benz GLB vs Tesla Model Y

Key Differences

In terms of cargo space, the Tesla Model Y with the first row of seats upright has a length advantage: the Model Y is 6.3 in (17%) longer than the Mercedes-Benz GLB.

The GLB, on the other hand, scores points in height, depth, and narrowest width: the trunk opening height is 7.5 in (28%) higher, the distance from the loading edge to the trunk floor is 4.7 in (1100%) greater, and the narrowest width in the trunk is 3.9 in (11%) larger than in the Model Y.

Smaller differences (e.g., +2 in/5% width of the opening, +0.8 in/3% loading edge height, +6.7 in/10% length with folded seats) exist but do not reach the highlighted threshold of >10%.

Impact on Usability

The longer cargo length of the Model Y with the rear seat upright makes the vehicle more practical for longer, flat items (e.g., slats, skis, or long boxes) without folding down seats. For anything that requires space lengthwise, the Model Y offers a clear advantage.

The GLB, on the other hand, is more versatile in practice for bulky or awkward cargo: the significantly higher opening makes it easier to store tall items, the considerably greater depth (distance from loading edge to floor) means more usable storage space below the loading edge and simplifies stacking or fitting bulky goods.

The larger narrowest width makes it easier to load wider items. Together, these features mean that the GLB is often more practical in everyday use when transporting bulky, tall, or wide cargo.

Smaller differences such as the slightly lower loading edge on the Model Y (−0.8 in) or the slightly larger opening width of the GLB (+2 in) have only minor practical effects.

Also to note: the nearly 10% longer cargo floor of the Model Y with folded seats was not marked as >10%, but it can be relevant when transporting very long, flat items.