A self-propelled windrow merger includes a motor and a chassis. At the front of the merger are a first pickup and transfer assembly, a second pickup and transfer assembly and a third pickup and transfer assembly. A cab is above and behind the second pickup and transfer assembly. A folding mechanism for moves each of the pickup and transfer assemblies between a first position wherein the first, second and third pickup and transfer assemblies are laterally aligned and a second position wherein the first and third pickup and transfer assemblies are positioned rear of the cab.