The car is a Mk4 Astra hatchback 1.7tDi manual. Was driving to work this morning and felt what seemed to be like a slow loss of power for a few seconds.
Just before I parked up the battery warning light came on and remained on until I switched off. Switched off and restarted the car a few times and was fine but when idling the engine sounds different in terms of a weird whinning noise.
Not sure if this is the alternator or possibly something else.
I would be grateful if someone could point me in the right direction.
Thanks in advance