Benjy Weenink: Heartbroken family of 16-year-old passenger who tragically died in a horror crash that left four others badly injured share a powerful message

The devastated family of a 16-year-old tragically killed in a horror car crash have vowed to 'not hold bitterness in our hearts'.

Emergency services were called to Main South Road in Second Valley on the Fleurieu Peninsula, about 1.5 hours south of Adelaide, at about 5.15pm on Sunday and treated five teenagers after a Toyota HiLux lost control.

Benjy Weenink, 16, from Blackwood in Adelaide's southeast, who was a passenger in the HiLux, died at the scene.

The driver, a 17-year-old boy, along with three other passengers - a 16-year-old boy and two 15-year-old girls - were rushed to Flinders Medical Centre.

The teenagers are understood to have sustained non-life threatening injuries.

'We are heartbroken and are still trying to make sense of this tragedy but we will not hold bitterness in our hearts, but instead thank God for the wonderful 16 years we had with our beautiful boy Benjy,' the teen's family told Daily Mail Australia.

The family described the teen as a 'special human, who brought fun, light and joy everywhere he went'.

'He was warm, open-hearted, adventurous, clever, brave, funny, beautiful, kind and loved by so many,' they said.  

'He had the most natural ability to put anyone at ease with his gorgeous nature and sparkling smile and he was liked by everyone he met.'

The family recalled that Benjy was 'good at everything he tried', including surfing, skating, guitar, soccer, tennis and bouldering.

'You name it he could do it,' they said. 

'We are so proud he is our son, brother, grandson, nephew and friend, and he is so deeply loved'.

It is understood the group of teens had been staying at the Second Valley Caravan Park with a number of adults.

The crash occurred about 2.2km from the campground on Main South Rd, heading towards Rapid Bay.

Main South Road was closed for several hours as Major Crash officers examined the scene but has since reopened.

South Australian police said an investigation into the circumstances of the fatal crash was continuing.