A 22-year-old man [B] was arrested on suspicion of murder this morning, Thursday 8 August, at an address in Epsom.
He has subsequently been released on bail until a date in September..
The arrest was made in connection with the death of 25-year-old Liam Dent.
Police were called to a car in collision with a man on Moor Lane in Chessington at 00:13hrs on Friday, 26 July.
The driver did not stop and the man was dragged under the car for some distance.
Officers attended along with the London Ambulance Service.
Liam, from Chessington, was pronounced dead at the scene, and his next of kin continue to receive support from specialist officers.
A post-mortem examination held at Kingston Mortuary on Saturday, 27 July established cause of death as injuries consistent with a collision.
Detective Inspector Vicky Tunstall from Specialist Crime is leading the investigation.
"We have received a great response from the public who have provided us with useful information.
"I’d like to thank everyone who has aided us so far, but would like to highlight that we are still seeking information from anyone who knows anything about Liam’s death.
"No matter how small or insignificant you may feel it is, it could really help our investigation.
"Again, I would like to reassure the public that any such information will be treated with the utmost confidentiality."
On Thursday, 1 August a 17-year-old male [A] was arrested on suspicion of murder by officers in Surrey on behalf of the Met, and taken to a local police station.
He has since been bailed to a date in September.
The car believed to have been involved in the incident, a Ford S Max, was found burnt out on Cyclamen Way in Epsom, approximately one mile from the crime scene. Since then a further two vehicles have been recovered.
Any witnesses, or anyone with information that may assist police, should call the incident room number on 020 8721 4622 or 101 quoting CAD 96/26July. To remain anonymous, call Crimestoppers on 0800 555 111.