Gilly... how can I test my vacume pump for the central locking system? For 300E, 1987. Sometimes it seems to have power to it at other times not. I have yet to hear the motor for the vacume operate. Sometimes I can hear the signal from a door or trunk going to the motor's control but that is only a very faint click. Other times the board or motor makes a faint sound...
1993 190E 2.3
2000 Toyota 4x4 Tundra