The Berlin Duty Train made its last run in December 1990, and the Transportation Corps Museum at Fort Eustis, VA, has a supposed Berlin Duty Train car on display. Reportedly this car was renovated for such service but never actually used on the Berlin Duty Train. It still carries DB markings, not US Army and the TC branch insignia.
I've seen a European website that showed remaining ex-Berlin Duty Train cars covered with rust and sitting unused in a rail yard. Any that still exist are now very long in the tooth.
The TC Museum also has a European-style caboose on display and the sign next to it states it was used by the train crew on the Berlin Duty Train. This is NOT true. The caboose was used to carry MPs escorting freight trains in and out of Berlin and was not used in conjunction with passenger trains. The crew on the latter rode in cars in which half of the space was for baggage and half for compartments.
The last roster I saw of DOD-owned rail cars in CONUS did not include any passenger equipment.