The incident happened around Queen Mary Avenue around 3.55pm on Thursday, 4 June.
A 36-year-old man, who was driving a Vauxhall Astra Convertible, was knocked unconscious and sustained injuries to his face. He was robbed of his mobile phone and a small sum of cash.
He was taken to the Queen Elizabeth University Hospital to be checked over.
Police are appealing for anyone with information or who might have seen anything in the area at the time to come forward.
Constable Mhairi Gunn, from the Community Investigation Unit, said: “The man believes he was attacked by a group and we are appealing for anyone who may have seen anything in the area at the time, who has not already spoken to us to come forward.
“Enquiries in and around the area are ongoing. The area contains a number of houses and we are asking anyone who may be able to assist to get in touch.”
Anyone with information is asked to contact 101 quoting incident 2588 of 4 June.