The Mercedes-Benz 300 has 16 cu ft of cargo space. In practice that is 2 checked suitcases, or 8 carry-ons, or about 12 supermarket bags. A folded pushchair fits. Against 113 cars with a similar-sized cabin it sits below the average of 17.4 cu ft.
What actually fits in a 300
Cubic feet are an abstraction — 16 cu ft means nothing until you load it. Here is the same number in things people actually load, 2 checked cases or 8 carry-ons for the Mercedes-Benz 300, with a packing allowance — a boot is not a cube, and corners go to waste.
| What you are loading | How many fit | Each item |
|---|---|---|
| Checked suitcases | 2 | 27 × 21 × 14″ — 4.6 cu ft |
| Carry-on cases | 8 | 22 × 14 × 9″ — 1.6 cu ft |
| Supermarket bags | 12 | about 1 cu ft each |
| Golf bags | 2 | full set, about 5 cu ft |
| Folded pushchair | Fits | about 6 cu ft |
Counts assume 80% usable volume: luggage does not tessellate, and a wheel arch eats the rest.
Cabin or boot — where the space went
Every car is a fixed envelope, and designers decide how to split it between people and things — the Mercedes-Benz 300 gives 12.5% of its 128 cu ft to luggage. The share below is the honest way to compare an estate with a coupé of the same footprint, and among 113 cars with a cabin within eight cubic feet of the Mercedes-Benz 300 the boot averages 17.4 cu ft.
| Space | Volume | Share of total |
|---|---|---|
| Passenger cabin | 112 cu ft | |
| Cargo area | 16 cu ft | |
| Total interior | 128 cu ft |
Under 15% to luggage — the space went to passengers, not their bags.
Against cars with a similar cabin
Compared with 113 models whose passenger space is within eight cubic feet — a fairer group than marketing classes, which put an estate and a coupé in the same bracket.
| Measure | This car | Similar cars | Difference |
|---|---|---|---|
| Cargo volume | 16 cu ft | 17.4 cu ft | -1.4 cu ft |
| In checked suitcases | 2 | 3 | -1 |
Cars with the same room
Closest matches by trunk volume — useful when the boot is the deciding factor and the badge is not. The Mercedes-Benz 300 sits at 16 cu ft, so these are the cars that carry the same load.
| Car | Trunk volume | vs Mercedes-Benz 300 | Checked suitcases | Measured |
|---|---|---|---|---|
| Toyota Avalon | 0 cu ft | 2 | 2022 | |
| Hyundai Azera | 0 cu ft | 2 | 2017 | |
| Kia Cadenza | 0 cu ft | 2 | 2020 | |
| Honda Clarity | 0 cu ft | 2 | 2021 | |
| Ford Fusion | 0 cu ft | 2 | 2020 | |
| Kia K5 | 0 cu ft | 2 | 2026 |
Boot space is one number. Buying is a longer list.
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How we count
Cargo and passenger volumes come from EPA interior-volume records — the same figures manufacturers file for the window sticker, measured to a standard method rather than claimed in a brochure.
The luggage counts are ours — 2 checked cases for the Mercedes-Benz 300 come out of its 16 cu ft. We assume 80% usable volume, because a boot is not a cube: wheel arches, a sloping tailgate and the shape of the cases themselves waste the rest, which is why the Mercedes-Benz 300 counts as 12.8 cu ft of usable space rather than 16. Suitcase sizes are the airline standards — 22 × 14 × 9″ for carry-on, 27 × 21 × 14″ for checked, so the Mercedes-Benz 300 takes 8 of the small ones. Numbers are deliberately conservative; if we say four cases fit, four cases fit.
Frequently asked questions
How much cargo space does the Mercedes-Benz 300 have?
16 cu ft behind the rear seats, plus 112 cu ft of passenger cabin.
How many suitcases fit in a 300?
About 2 checked cases (27 × 21 × 14″) or 8 carry-ons, allowing for the fact that a boot is not a perfect cube.
Will a pushchair fit in a 300?
Yes — a folded pushchair takes roughly 6 cu ft and this car has 16, so it fits with room for shopping.
Is that a lot for this size of car?
Compared with 113 cars of a similar cabin size, it is below the average of 17.4 cu ft.
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