Trunk comparison: Mercedes Benz GLE vs Peugeot 308 SW 3-row

Key Differences
Mercedes‑Benz GLE has a trunk that is 19.3 in (34%) larger with the seats folded down than the Peugeot 308 SW (3-row). Likewise, the GLE's trunk is 27.6 in (200%) larger with all seats upright.
The Peugeot 308 SW has a significantly greater trunk depth (loading edge to trunk floor): +1.6 in (300%) compared to the GLE. Additionally, the loading edge of the Mercedes is 8.3 in (38%) higher above the ground than that of the Peugeot.
What impact does this have on usability?
The volume advantage of the Mercedes GLE (especially with folded down or upright seating in all rows) clearly makes it more suitable for transporting large, bulky, or long items – such as furniture, longer hardware store goods, or moving items. The GLE also offers more usable space when loading lots of luggage.
However, the higher loading edge of the GLE makes loading and unloading heavy items more difficult: lifting must be done higher, which is more strenuous with regular transport of heavy loads. Here, the Peugeot scores with its significantly lower loading edge: heavy suitcases or equipment are easier to load.
The greater trunk depth of the Peugeot means the storage space is shaped deeper vertically/inside – small to medium-sized items can be stored deeper and lie more securely in a recess.
Combined with the lower loading edge, this results in overall more convenient handling for everyday transports and frequent loading/unloading.
Small differences such as a slightly greater opening height or width differences (each by a few percent) are rather secondary in everyday use: they only slightly affect loading and do not change the fundamental usability.