Trunk comparison: Audi A6 Sedan vs Mercedes Benz GLC
Key Differences (highlighted: >10%)
The Audi A6 offers a longer cargo space: with the seats folded down it is +7.9 in (11%) longer, and with the first row upright even +8.7 in (24%) longer than the GLC. The depth of the trunk (distance from loading edge → trunk floor) is significantly greater in the A6: +4.7 in (1100%).
On the other hand, the Mercedes‑GLC has a taller and wider opening: the opening height is +10.2 in (52%) greater, and the width of the trunk opening is +6.3 in (17%) wider than in the A6.
Other Differences
The loading edge of the GLC is +2 in (8%) higher above the road than in the A6; the narrowest width in the trunk is +3.1 in (8%) greater in the GLC. These two values are under 10% and therefore not highlighted, but they can affect everyday usability.
Impact on Usability
Loading volume and shape: Due to the significantly greater depth and longer loading surfaces, the Audi A6 is better suited for long, low items (e.g., long boxes, skis, building materials) and overall offers more easily usable cargo space for items loaded lengthwise.
The deeper loading well can also accommodate more volume below the loading edge.
Access and Bulky Items: The Mercedes‑GLC has an advantage with very tall or wide-format cargo — the significantly higher opening height and larger opening width make it easier to load bulky, cumbersome items (e.g., large boxes, strollers, furniture parts), even though the interior usable cargo space is shorter.
Lifting and Comfort: The loading edge of the GLC is somewhat higher (+2 in), which can make lifting heavy items more difficult in some cases; loading is slightly more ergonomic in the A6. The narrower constriction in the A6 (−3.1 in) can additionally complicate fitting wider items.
Conclusion: For regular transport of long, flat, or lengthwise-loaded cargo, the Audi A6 is the better choice. For frequent loading of tall, bulky, or wide items, the Mercedes‑GLC is more practical due to the larger opening height and width.