Work on a winged version of the A4 had been stopped in early 1943. Now, with the Allies overrunning launch sites in Belgium and Holland, Kammler ordered it resumed in order to have a long-range version of the weapon that could reach England and Allied continental rear areas from Germany. Within weeks the wind tunnel results generated since 1940 were reviewed, and a prototype winged version of the missile built. On the first launch, the steering failed at 30 m, and the missile crashed a short distance from the pad. Several more test articles were on hand, but testing could not resume immediately due to a shortage of alcohol fuel.

The first successful launch, this reached 80 km altitude and 1200 m/s. It then flew stably in supersonic flight using its 13.5 sq. m. wing. The automatic guidance system was designed to keep the missile on course in both supersonic and subsonic flight regimes. However the wing broke off shortly after the beginning of the glide. This concluded work on the A4b/A9; the increasingly chaotic situation in Germany prevented further flight tests.

Battery SS 500 departs Hellendoorn piecemeal before the Allied advance and disintegrates. Some units were equipped with 15 cm Nebelwerfer rockets and ordered to participate in the defence of Berlin. But the war was over before they could reach their destination.

After being forced to retreat from its operational area in late March 1945, Battery 836 was to have moved first to a location 16 km west of Osnabruck for firing operations, but the situation on the ground prevented this. They then moved to Celle (about 30 km north of Hanover). From there the remaining rockets were to be fired against Russian forces at Kostrzyn, 100 km northeast of Berlin. The unit could not set up in time to accomplish this before Kammler ordered the rocket units to be dissolved and convert to infantry. On April 8 the battery destroyed its rockets and launching equipment and ceased to exist. In all, 1593 V-2's had been fired against Antwerp, 1225 against London, and 461 against other cities and targets, by one accounting. A total of 3000 to 3280 missiles had been fired in combat launches, and another 440 to 1000 in test and training launches. A total of 6,100 missiles had been manufactured, at least 1,800 of which were early production versions that were either scrapped or cannibalised for later production.