Trunk comparison: BMW X3 vs Mercedes Benz CLA Shooting Brake
Key Differences
With the front seats upright, the trunk of the Mercedes-Benz CLA Shooting Brake is 4.3 in (12%) longer than that of the BMW X3, meaning the CLA offers more cargo length for longer items when the rear seats are in use.
The height of the trunk opening is 3.1 in (11%) larger on the BMW X3 compared to the CLA, allowing taller cargo to pass through the opening more easily.
The trunk depth (distance from loading edge to trunk floor) is 8.7 in (2100%) greater on the CLA, indicating a significantly deeper cargo well. The width of the trunk opening is 9.8 in (29%) wider on the BMW X3 than on the CLA, which greatly facilitates loading and unloading wider items.
Other, Smaller Differences
The loading edge of the CLA is 2 in (7%) higher above the ground than that of the X3, and the narrowest width inside the trunk is 2 in (5%) larger on the X3. These differences are minor and have less impact on everyday usability.
Implications for Usability
The longer loading length of the CLA with rear seats upright makes it more practical for long, slender cargo (e.g., slats, skis, long boxes) without folding the seats down.
The very deep trunk of the CLA increases usable volume especially in the cargo well, suitable for stackable or tall items below the loading edge, but can make lifting or setting down bulky, heavy cargo more difficult due to the greater vertical space to the floor.
The BMW X3 scores with its higher and significantly wider trunk opening: wide, bulky items can be maneuvered more easily around the tailgate and loaded more simply through the larger opening overall. The higher opening height also facilitates loading tall items without edge contact.
Conclusion: For long cargo with the rear seats upright and a deep loading volume, the CLA is advantageous; for frequent loading and unloading of wide or tall items, the X3 is more practical.
Smaller differences such as the slightly higher loading edge on the CLA or the marginally larger narrowest width on the X3 have a minor effect in everyday use.