Trunk comparison: BMW X1 vs Mercedes Benz GLC

Key Differences and Their Consequences for Usability
The most noticeable difference concerns the depth (loading edge to trunk floor): In the BMW X1, this is 1.2 in (200%) greater than in the Mercedes‑GLC.
Practically, this means: The X1 offers significantly more vertical space directly behind the loading edge. This makes it easier to store tall or stackable items and makes the X1 less sensitive to point loads that extend above the floor.
The other differences are comparatively small (<10%) and have minor but noticeable effects: The GLC offers about 4.3 in longer loading length with the seats folded down (+7%), its width at the narrowest point is 3.5 in greater (+9%), and the height of the opening is 1.6 in (+6%) higher. The width of the trunk opening is 1.2 in wider in the GLC than in the X1, and the loading edge height is the same in both models. Taken together, this means: The GLC is better suited for longer or wider loads and accommodates large-format items more easily because the opening and interior width are somewhat more generous.
Conclusion: Those who frequently transport tall or stackable items directly behind the loading edge benefit from the greater depth dimension of the BMW X1. Those who more often carry long or wide loads (e.g., furniture parts, long boxes) have advantages in the Mercedes‑GLC due to the slightly greater length and width as well as the higher opening.
Otherwise, the differences are small and only moderately affect everyday use.