Trunk comparison: BMW X3 vs Mercedes Benz GLC

Key Differences

There are no dimensional differences between the BMW X3 and Mercedes-Benz GLC exceeding 10%; all measured deviations range between 1–4%. Specifically, the X3 offers a trunk that is 1.2 in (≈2%) longer with the seats folded down and 0.8 in (≈2%) more length with the first row of seats upright.

The height of the X3's trunk opening is 1.2 in (≈4%) greater, and the width of the opening is 0.8 in (≈2%) wider. The trunk depth and the narrowest width are the same for both models; the GLC's loading edge is 0.4 in (≈1%) higher above the ground.

Impact on Usability

Because all differences are very small, the practical impact in most everyday situations is minimal. The slightly longer cargo space of the X3 (2–1.2 in) can slightly ease loading very long but narrow items (e.g., longer skis, a narrow shelf board) but does not make a noticeable difference for luggage space.

The 1.2 in higher trunk opening and 0.8 in wider opening width of the X3 improve sliding in bulky items somewhat and simplify maneuvering when loading, especially when the opening is used tightly.

Conversely, the slightly higher loading edge of the GLC (0.4 in) is noticeable during lifting but not relevant for everyday use.

Conclusion: Both models are very similar in practice – the X3's advantages in length and opening dimensions exist but are small. Those who regularly transport very long or unusually shaped loads should consider these millimeter differences; for typical luggage or shopping tasks, they hardly matter.