Trunk comparison: Mercedes Benz GLB vs VW Polo

Key Differences

The data shows that the Mercedes-Benz GLB offers significantly more cargo space. With the seats folded down, the trunk is +15.4 in (28%) longer, and with the first row of seats upright, it is +11.4 in (44%) longer.

The height of the trunk opening is +7.5 in (28%) greater, the depth (loading edge to trunk floor) is +1.6 in (50%) more, and the width of the trunk opening is +5.5 in (15%) larger.

Smaller differences such as the narrowest trunk width (+1.2 in / 3%) and the loading edge height from the road (+0.8 in / 3%) are minor in comparison.

What are the practical implications?

The longer dimensions mean that the GLB has a clear advantage especially when transporting long or bulky items: with the seats folded down, significantly longer goods (e.g., slats, furniture panels, skis) can be transported, and with the first row of seats upright, considerably more usable trunk space remains for suitcases, shopping, or child equipment.

The greater opening height and wider opening make loading and unloading bulky or tall items (strollers, boxes, crates) easier because more clearance height and width are available.

The +1.6 in (50%) greater loading depth (loading edge → floor) increases the usable depth directly behind the loading edge; this can prevent items from leaning or hitting the tailgate and provides more stable loading space for short cargo containers/boxes.

The slightly higher loading edge of the GLB (+0.8 in) means a bit more effort is required to lift heavy loads in, but this is only a minor limitation in everyday use. The slightly larger narrowest width (+1.2 in) has practically no impact.

Conclusion: Those who regularly transport long, tall, or wide loads or often travel with a stroller/more luggage will benefit significantly from the GLB. For occasional shopping or typical city use, the Polo is generally sufficient, but the major advantages of the GLB rarely come fully into play there.