May 19 (GMM/ Toto Wolff has continued to narrow his focus on formula one with Mercedes.

Since taking over as the German giant’s team boss, the 43-year-old has been diluting his shareholding in the rival Williams team.

And on Tuesday it emerged that Wolff has sold his significant stake in HWA, the Mercedes-linked company involved in the German touring car series DTM.

Wolff bought the 49 per cent shareholding in 1999. HWA confirmed that founder and chairman Hans Werner Aufrecht has increased his stake in the process.

“The transaction took place in the context of the reorganisation of the investment portfolio of Mr Wolff,” the company said.