Ford Tourneo rough cold start

Poor cold starting and rough running often points to fuel delivery issues. Has the vehicle had an injector test performed? Perhaps injector cleaning may resolve your issues.

Thanks for your reply. No, I haven't had an injector test done yet. Where exactly should I start to diagnose the issue effectively? Are there any specific tools I would need for a diagnosis?

Given the symptoms and mileage, a defective injector valve/injector seems highly probable. I suggest visiting a workshop. It may save you time and further frustration.

Thank you for the advice. I took it to a workshop, and you were right, it was a faulty cold start injector. The repair cost me 515€. Runs like new again!