I just changed the all the light bulbs in my '84 300D. Both tail assemblies and front turn signals. Now the turn signals stay on when the headlights are turned on. Green arrows illuminated in the dash. Either one side or both depending on how the bulbs are screwed in. The turn signal/hazard works fine when the headlights are off. It appears the bulbs are screwed in properly. I can't turn them any further. Bad turn signal sockets?