Trunk comparison: BMW iX1 vs Mercedes Benz GLB

Key Differences

The trunk opening of the Mercedes‑Benz GLB is significantly higher (+6.3 in / +22%) than that of the BMW iX1. The depth of the trunk (loading edge to trunk floor) is considerably greater in the GLB (+3.9 in / +500%).

Impact on Usability

The much higher opening of the GLB makes it easier to load tall or bulky items (e.g., larger boxes, strollers, bulky furniture parts) and reduces tilting when loading.

The greater depth means more usable vertical capacity behind the loading edge — allowing the GLB to accommodate more volume for tall or deeply seated cargo.

Other, smaller differences (under 10%) have less practical impact: When all seats are folded down, the GLB offers a +5.9 in (≈9%) longer cargo floor; with the rear seats upright, it is +2 in (≈6%).

The narrowest width in the trunk is +2 in (≈5%) larger in the GLB, while the width of the opening is +1.2 in (≈3%) larger in the BMW. The loading edge height is the same for both models.

Conclusion: For transporting tall or deeply seated, bulky items, the GLB is clearly advantageous due to the higher opening and greater depth. Differences in length and width are moderate and only noticeably affect very specific loading needs (very long or very wide items).