Police are hunting for two men who stole a luxury car with a baby inside from Melbourne’s north yesterday afternoon.

A family friend leapt on to the bonnet of the Mercedes station wagon as one of the thieves drove it away from the intersection of Ohea and Ross Streets in Coburg about 3pm.

CCTV shows the woman throwing herself on to the car, as the six-month-old baby girl remained inside.

The thief drove for about 400m with her on the bonnet, and the car was later found dumped with the baby still inside near Haig Street.

Both the woman and the baby were unharmed.

Senior Constable Virginia Creece said the “brazen” attack left the baby’s mother “hysterical”.

The driver allegedly told a passer-by there was a baby inside the car and he “didn’t know what to do with it”.

The mother's friend can be seen desperately latching onto the Mercedes' bonnet. (9NEWS)

Witness James Fenton said he heard “commotion” and frantic screams.

“We stopped work and I heard a woman screaming, she said ‘call the police’ and was on the ground at the time,” he said.

“She was hysterical and I couldn’t get much out of her.”

The thief who drove the car is described as being European with dark wavy hair and aged about 30.

He was wearing a light coloured T-shirt and dark pants at the time.

Another man who fled the scene in a Toyota Camry sedan with a rear spoiler is believed to be in his late 20s and had dark hair tied up in a bun. He was wearing a green T-shirt and dark pants.