I have a 2016 Ford Mondeo Titanium Tdci Auto 1997cc diesel. Whilst driving, the car displayed a message ‘charging system - service now’ and the battery light came on. 10 minutes later, the infotainment system said ‘battery saving’ and turned itself off. Another 10 minutes and I lost power steering. I limped it home. Just before I got home, the main display turned off and the car started juddering under power. I got it onto the driveway where it is now completely dead.

I have to suspect the alternator is not charging the battery, but would it lose power that suddenly while driving?

 

Very likely alternator failure and the battery is also possibly on it's way out.

1 hour ago, Sidaho said:

would it lose power that suddenly while driving?

Yes, no electric = no running engine.

Thanks. I’ve had it lifted to a garage. The recovery agent and the mechanic at the garage are both fairly confident it’s the alternator. Will post the final outcome.

So the one way clutch on the alternator was slipping. That was replaced and the old alternator was fine. Cost £350.

I assume that 80% of that cost was labour !!

Over the Christmas holidays I bought and fitted a service exchange alternator on my daughters 2010 Kuga, it cost £85

At least you have your car back and its working again 😀