Trunk comparison: BMW 3 Series Touring vs Mercedes Benz CLA Shooting Brake

Key Differences (highlighted: >10%)

The most noticeable difference is the significantly greater trunk depth dimensions in the Mercedes: the depth from the loading edge to the trunk floor is +8.3 in (≈2100%) larger in the CLA than in the 3 Series Touring.

The loading edge of the CLA also stands +5.9 in (25%) higher above the road surface. The width values show a different picture: the trunk of the CLA is +3.9 in (11%) wider at its narrowest point, while the opening width of the loading aperture in the BMW is +5.1 in (15%) larger.

Impact on Usability

The much greater depth of the CLA means more usable volume in length/height direction: bulky or tall items can be positioned further back or deeper in the cargo area, and overall more cargo fits under the loading edge.

However, due to the higher loading edge of the CLA (plus 5.9 in), more effort is required to lift heavy items over the threshold — loading and unloading is less comfortable than with the lower 3 Series.

The greater interior width of the CLA at the narrowest point (+11%) allows wider items in the cargo area but requires that these objects also fit through the opening.

Here the BMW has an advantage: the loading opening is 5.1 in (15%) wider, making it easier to load wide parts. In short: the CLA offers more interior space, the BMW makes it easier to load large items.

The other differences — volume differences with seats folded down or upright (+2% and +6%) and the height of the trunk opening (+1%) — are minor and hardly affect everyday usability.

Brief Recommendation

If you frequently store large or tall cargo and interior space is more important, the Mercedes CLA scores with depth and interior width.

If, on the other hand, you often need to load and unload heavy, bulky items practically and with back-friendly ease, the BMW 3 Series Touring is often more practical due to the lower loading edge and wider loading opening.