On 5 January 1758 Wedel took over the Infantry Regiment Schultze (Nr. 29), though he moved to the head office of his prior regiment only three weeks later. In the spring he joined the siege corps before Olomouc. Wedel repulsed Laudon's attacks in Littau on 20 June, and in Gundersdorf on 28 June. In September, he was transferred to a corps in the Uckermark to free it from Swedish control.