A thief escaped in the Mercedes he had just stolen after burgling a home, where he also nabbed expensive jewellery.
The black Mercedes E220’s keys and jewellery worth £2,000 were taken from the house in Monmouth Close, Aylesbury.
A man was seen driving away in the car, which is valued at £35,000 at car dealerships.
It happened between 3.40pm and 4.45pm on Sunday and it is believed the thief entered the home from the back garden.
The man driving away in the Mercedes was white or Asian, in his late 20s to early 30s, slim, clean shaven, with short brown hair which was shaved at the sides but longer on top. He was possibly wearing a backpack.
Anyone with information is asked to contact Det Con Emma Francis on 101.
Alternatively, contact Crimestoppers anonymously on 0800 555 111.