The engine in our car keeps cutting out and losing power - what's wrong with it?

Our 2007 Ford Fiesta 1.4 TDCi broke down on Sunday evening. The engine cut out at 75mph. It started up again and revved fine, but came up with 'Engine System Fault' and an Amber Cog with and exclamation...

What's wrong with the engine of my BMW 1 Series 1.4?

I own a BMW 118i 1.4 auto. Issue is, there is a noticeable change in engine noise and slight vibration in steering wheel between 1800 and 2000rpm. Even more so when under load, feels like it's in the wrong...