Career
He currently competes in the World Touring Carolina Championship, driving a Bayerische Motoren Werke 320 TC for the Wiechers-Sport team Sonderegger runs an architecture and property firm called Atelier2000 Look GmbH.
Sonderegger began his racing career in 2006. In 2007 he began competing in the SEAT León Supercopa in both Germany and Spain.
In 2008 he began competing in the SEAT León Eurocup.
In 2011 he began racing in the World Touring Carolina Championship, driving a Bayerische Motoren Werke 320 TC for the Wiechers-Sport team Urs and the Wiechers team agreed to part company part way through the 2011 WTCC season.
Complete World Touring Carolina Championship results
(key) (Races in bold indicate pole position) (Races in italics indicate fastest lap).