Frentzen takes Opel drive

Frentzen is yet another high-profile signing for the series, and he joins Mercedes' Jean Alesi as a recent Formula 1 star to have taken up the challenge.

"I must get used to having a roof over my head," said the 36-year-old, who was let go by Sauber at the end of this season. "But it was important for me to have four wheels underneath me again.

"I don't think DTM has anything to envy to Formula One and I don't feel sad at all. I'm looking forward to exciting races."

The announcement more than likely signals the end of Frentzen's career. Frentzen has driven in Formula 1 every season since 1994. He's had two stints with Sauber, as well as spells with Williams, Jordan, Prost and Arrows.

Frentzen won three Grands Prix - one for Williams in 1997 and two for Jordan in 1999, when he remained in the championship hunt until late in the season.

"Heinz is a strong fighter and a highly popular racer," said Opel chairman Carl-Peter Forster. "He's an excellent match for the Opel brand."

Laurent Aiello has also been linked to a Vectra seat, but Frentzen's signing puts that in some doubt since Opel has said it may not build more than four of the new cars. Other drivers confirmed in the Opel camp so far are Peter Dumbreck, Marcel Fässler and Manuel Reuter.