Trunk comparison: BMW 3 Series Touring vs Mercedes Benz GLE

Key Differences
The Mercedes-Benz GLE offers a 7.5 in (+11%) longer cargo space with the seats folded down compared to the BMW 3 Series Touring. The trunk opening on the GLE is 3.5 in (+13%) higher, and the narrowest width in the cargo area is 3.9 in (+11%) larger than on the BMW.
The loading edge of the GLE is significantly higher: +6.7 in (+28%) above the road.
Smaller differences without emphasis include: with the first row of seats upright, the GLE is only +2 in (5%) longer, the depth from bumper to ground is +0.4 in (0%) greater on the BMW, and the width of the trunk opening on the GLE is +3.9 in (10%).
Impact on Usability
Due to the longer loading surface with folded seats, the GLE is better suited for long or bulky items (e.g., slats, furniture parts, skis).
The higher trunk opening increases the installation dimensions for tall objects and makes angling large loads easier. The greater minimum width makes storing wider items simpler and reduces the risk of snagging on the interior.
On the other hand, the significantly higher loading edge of the GLE makes lifting heavy items more strenuous and requires aids (dollies, ramps) or greater physical strength for regularly heavy loads.
The slight advantages of the GLE in normal use (e.g., +2 in length with upright rear seats, somewhat larger opening width) are noticeable in everyday life but not decisive. The BMW offers practically no usability disadvantage with a slightly greater ground clearance (0.4 in).