I have recently bought a Mercedes-Benz C-Class auto, and in order to make things easier for my wife and I, it might make sense to purchase a small automatic as a second car for short trips. Annual mileage would be about 5000.

Could you suggest a petrol with four or five doors. Reliability and economy are important, and should be able to accommodate two small grandchildren in the back.
Our budget is about £8000-10,000.