Mercedes SLC Diesel Stalling Problem Solved

Sounds familiar. I had a similar problem with my SLC. See if your hoses are clogged. A faulty pressure sensor can also trigger the check engine light and cause stalling because of issues with the EVAP system and fuel tank ventilation. It's a common problem.

Clogged hoses? Where should I be looking for them? Are they easy to reach, or do I need to disassemble the engine?

They're part of the tank ventilation system, so begin around the fuel tank and trace them from there. Unless you're very confident, it might be worth having a workshop look at it. They can properly diagnose the EVAP system and check for any leaks or tank ventilation issues. It'll save you trouble.

Thanks for the advice. I took it to the workshop, and you were right. Clogged hoses in the tank ventilation system. They replaced some hoses and cleaned the valve. It cost me 175€, but the check engine light is off, and it's running well again.