Trunk comparison: Audi Q3 vs Mercedes Benz GLC
Key Differences
The measurements show only a few major deviations.
The Mercedes-Benz GLC offers a 3.5 in (5%) longer cargo area with the seats folded down and 1.2 in (3%) more length with the first row upright than the Audi Q3. The narrowest interior width in the trunk is 3.9 in (10%) larger in the GLC; the width of the opening is 0.8 in (2%) more favorable in the Q3. The trunk opening of the Q3 is 0.8 in (3%) higher, and the loading edge of the Q3 is 1.6 in (6%) higher above the road.
The most significant difference is the depth from the loading edge to the trunk floor: the Audi Q3 is 3.5 in (800%) larger here than the GLC.
Impact on Usability
Depth (loading edge → trunk floor): Due to the 3.5 in (800%) greater depth, the Q3 offers significantly more space below the loading edge.
Practically, this means bulky or tall items can be recessed deeper into the cargo space, easier stacking is possible, and loose luggage lies lower and more stable. Disadvantages: the loading edge of the Q3 is 1.6 in higher — lifting heavy items over the edge is therefore more strenuous than with the GLC.
Length (seats folded / seat row upright): The 3.5 in longer usable depth in the GLC with folded seats and the 1.2 in additional length with the seat row upright are practical for particularly long items (e.g., slats, skis, longer furniture parts).
The advantage is noticeable for length-oriented transport tasks, but with 5% and 3%, these are moderate differences.
Width and opening: The 3.9 in larger narrowest interior width of the GLC makes it easier to store wider items through the interior; the 0.8 in larger opening width of the Q3 helps when inserting flat, wide loads.
These differences are relevant when the cargo is close to the critical width but are rather situational in everyday use.
Height of opening and loading edge: The 0.8 in higher opening of the Q3 slightly facilitates pushing through tall objects, while the 1.6 in higher loading edge makes lifting more difficult.
Taken together, this means: the Q3 is better when interior depth and a slightly higher opening are important; the GLC is more practical for lifting heavy loads and storing very long or widest items.
Conclusion: For frequent transport of tall, stackable, or awkwardly shaped cargo, the Audi Q3 is advantageous due to the significantly greater depth (strongly emphasized). For long items and overall somewhat easier loading/unloading (lower loading edge, larger interior width), the Mercedes-Benz GLC is more suitable.