Trunk comparison: BMW X5 vs Mercedes Benz GLC

Key Differences

The BMW X5 offers a noticeably longer cargo space with the rear seats folded down and the front row upright: +4.3 in (12%) more length when the front row is upright.

Additionally, the loading edge of the X5 sits +3.1 in (11%) higher above the ground than that of the GLC. These two differences each exceed 10% and are therefore the most relevant distinctions for practical use.

Impact on Usability

The 12% greater loading length with the front row upright means the X5 can transport longer items behind the rear seats (e.g., skis, long boxes, or furniture parts).

For users who frequently need to carry longer cargo or require the maximum trunk depth without folding seats, the X5 is practically superior. When transporting multiple large suitcases or bulky sports equipment, the X5 offers more flexibility.

The 11% higher loading edge has a different effect: loading and unloading heavy or bulky items requires more effort in the X5 because the lift height is greater.

This makes handling heavy loads less comfortable and can increase the risk of back strain. Users who often load heavy suitcases, tools, or bulky boxes (or load alone frequently) will find the lower loading height of the GLC a practical relief.

Other (Smaller) Differences

The opening height of the X5 is 1.6 in (about 5%) larger, the depth (loading edge to ground) is nearly identical (+0.4 in), and the narrowest trunk width is the same.

The width of the trunk opening is 0.4 in (1%) larger on the GLC — these differences are minor and hardly affect everyday usability compared to the two aforementioned deviations exceeding 10%.

Conclusion

Those who frequently transport longer items or need more usable cargo length without folding seats benefit from the BMW X5. Conversely, those who regularly want to load heavy items alone and comfortably have the practical advantage with the lower loading edge of the Mercedes‑GLC.