
Yes, a Mercedes-Benz C-Class can fit three car seats, but it's a tight squeeze that requires careful planning and specific equipment. It is not a straightforward task. For most families, the C-Class is better suited for two car seats, providing ample space and comfort. Installing three will work best with a combination of narrow, compact car seats and strategic placement, typically two outboard seats using the LATCH system and the center seat secured with the vehicle's seat belt.
The primary challenge is the C-Class's interior width. While a sedan or wagon, its rear bench is designed for two adults in comfort, not three bulky child restraints. You'll likely encounter issues with the seats overlapping or pressing against each other, which can compromise a proper installation. The center seating position is especially narrow.
Key factors for success:
| Consideration | Details for Mercedes-Benz C-Class (W205/S205 generation typical) |
|---|---|
| Rear Hip Room (Shoulder Room) | Approximately 55.1 inches |
| Recommended Car Seat Type | Slim/Compact (e.g., Diono, Clek, Graco SlimFit) |
| Center Seat LATCH | Usually not available; requires seat belt installation |
| Ideal Child Ages | Two forward-facing and one rear-facing, or three forward-facing |
| Realistic Assessment | Challenging but possible with the right equipment; not recommended for daily use if three seats are a constant need. A larger vehicle like a SUV or minivan is a more comfortable long-term solution. |
The most reliable advice is to take your specific car seats to the dealership or a certified Child Passenger Safety Technician for a trial fitting before committing. For frequent use with three young children, a vehicle with a wider cabin, like the Mercedes GLS or a minivan, would be a significantly more practical choice.

We managed it in our 2018 C-Class, but just barely. We used two Diono Radians and an infant seat. Getting them all clicked in was a puzzle every time, and buckling the kid in the middle was a knuckle-buster against the front console. It worked for carpooling to preschool twice a week, but I'd never want to do it every single day. If you have three kids full-time, you’ll be shopping for a bigger car within a year.


