In 1308, Adolf succeeded as Count of Berg upon the death of his uncle William I of Berg who had no children. Adolf was an important and loyal supporter of Ludwig IV of Bavaria, helping him since 1314 in the war of succession. As a result of Adolf's 1312 marriage to Agnes of Cleves, he received the Rhine customs of Duisberg as a dowry and these were confirmed as an imperial fief by Emperor Louis in 1314. He continued the constant feuds between the House of Berg and the Archbishops of Cologne. In 1327/28, he joined Louis on his trip to Rome where he was crowned as Emperor. Adolf received the privilege to mint silver which he did at Wipperfürth. In 1337 Adolf joined the English-German Alliance which caused the start of the Hundred Years' War.
In 1312 Adolf was married to Agnes of Cleves (c. 1295 – aft. 1361), daughter of Dietrich VII, Count of Cleves and Margaret of Habsburg-Kiburg. He died on 3 April 1348 without children and was succeeded by his only surviving niece, Margaret of Ravensberg by right of her mother, and her husband Gerhard VI of Jülich as Count and Countess of Berg.
- Walther Möller, Stammtafeln westdeutscher Adelsgeschlechter im Mittelalter (Darmstadt, 1922, reprint Verlag Degener & Co., 1995), Vol. 3, page 211.