Firefighters braved frigid conditions as they battled a vehicle fire that broke out in the showroom of a Mercedes-Benz dealership in Lynnfield early Thursday morning.

A security guard patrolling the area of Flagship Motorcars of Lynnfield on Broadway around 4 a.m. called 911 after noticing a glow coming from the front window of the building, according to Lynnfield Fire Chief Glenn Davis.

Firefighters responding to the scene found that a sprinkler system contained the flames to the vehicle but the building had been filled with smoke.

Crews dealt with freezing temperatures, which caused the parking lot to ice over.

One firefighter may have sustained a finger injury from falling on the ice but no one was transported to the hospital, Davis said.

Hours after the first fire broke out, a second vehicle parked in the lot outside the showroom started smoking and smoldering.

The State Fire Marshal’s Office is investigating the cause of the fires.