 New features included entry to the cabs through a central door, rather than a side door, missile-proof windscreens with windscreen wipers, and the ability to charge the batteries while operating on electrified lines.One departure was the fitting of traction control equipment by Kiepe, which prevented them from working in multiple with any of the previous machines.They were not a success, as five of the six had been withdrawn from service by August 1993, while a decision was made about their future, and the sixth was withdrawn some time later.