Trunk comparison: Mercedes Benz GLB vs Mercedes Benz GLC

Key Differences

In the available data, two noticeable advantages stand out for the GLB: The height of the trunk opening is 4.7 in or 16% larger than that of the GLC, and the depth of the trunk (distance from loading edge to trunk floor) is 4.7 in or 1100% larger.

Other differences are significantly smaller: The GLB has slightly longer loading lengths with folded seats (+0.8 in, about 1%) and with the first row of seats upright (+0.8 in, about 2%).

The loading edge on the GLB is only 0.4 in higher above the ground (+1%). The GLC is wider at the narrowest point of the trunk (+5%, +2 in) and its trunk opening overall is somewhat wider (+4%, +1.6 in).

Impact on Usability

The significantly larger opening height of the GLB makes loading tall or bulky items easier: bulky boxes, tall suitcases, or standing items can be slid in more easily horizontally because there is more headroom or passage space.

The significantly greater depth of the GLB means a much deeper cargo area; practically, this means more usable vertical volume and space for stacked luggage or longer items that can be placed along the floor surface.

In contrast, the GLC offers slight advantages at the narrowest point and in opening width: wider items or very flat, wide loads can be loaded crosswise somewhat more easily. The minimally longer loading lengths of the GLB (each about 1–2%) and the 0.4 in higher loading edge are negligible in practice.

Conclusion: For transport tasks involving tall or bulky loads, the GLB is better suited due to the significantly larger opening height and much greater depth. If mostly wide, flat items are being loaded, the GLC offers advantages through its somewhat greater width — however, the differences there are small.