Trunk comparison: Hyundai IONIQ vs Mercedes Benz GLC

Key Differences

Three differences stand out clearly from the data: the height of the GLC's trunk opening is 3.9 in (≈15%) larger, the width of the GLC's trunk opening is 6.3 in (≈17%) larger, and the depth of the trunk (loading edge → trunk floor) of the Hyundai IONIQ is 4.7 in (≈1100%) larger.

All other differences (e.g., length with folded seats +7% in favor of the GLC, loading edge height +4% for the IONIQ, narrowest width +10% for the GLC) are significantly smaller.

Impact on Usability

The greater height and width of the GLC's trunk opening make loading and unloading wide or tall items significantly easier: bulky furniture, boxes, or large suitcases fit more easily through the opening, and handling is more comfortable due to the larger clearance.

The slightly greater width at the narrowest point (≈10%) also supports loading wider parts.

The significantly deeper trunk floor in the IONIQ, on the other hand, means more usable interior volume below the loading edge: items can be recessed deeper and lie more stably, and smaller cargo is better secured.

This can be advantageous for many rather low or less sensitive items. At the same time, the IONIQ's loading edge is slightly higher (≈1.2 in), which can minimally complicate handling heavy loads — but this effect is small compared to the benefits of the deeper floor.

The differences in trunk length (2–7%) are minor and hardly affect everyday practicality. In summary: For wide or tall cargo, the GLC is the more practical choice due to the larger opening; for deeper, stable storage of luggage and smaller items, the IONIQ offers advantages thanks to the greater depth.