He was active in Norwegian-Swedish diplomacy and played a central role in the 1905 dissolution of the union between these countries.

In his time as owner, a large park was built between 1898 and 1900 by the English landscape architect Edward Milner (1819–1884).

The estate had a large main building, which Wedel redesigned in French architectural style.

In 1883 he married Alice Thekla Louise von Wagner (1861–1913) who was a member of one of Germany's industrial families.

In 1916, as a widower, he married an American heiress, Mary von André, née Palmer (1859–1941).

In 1940, when the German forces invaded France, he and his wife relocated to Lisbon, Portugal where he was widowed for the second time in 1941, and died in 1942.