In 1955 the option M164 was provided by Volkswagen for the USA market.
Volkswagen stopped using the central brake light on the decklid on 05-04-1957.
From now on they outfitted the buses with dual taillights who had the functions: tail/stop/direction indicator light. This is possible while the current of the brake light switch is running over the indicator switch.

211945117 Rim for combination stop/fail light
211945185 4X Screw for rim 211945117
211945187 6X Rubber washer for screw 211945185
211945237 Reflector for combination stop/tail light
211945241 Lens for combination tail/stop/direction indicator lamp