I have a 1984 300SD, and several of the vacuum actuator valves for the climate controls are leaking. I know I have seen discussions about being able to replace the diaphragms without having to buy the actuators, yet when I called my trusted parts dealer, he says he has never heard of this and does not stock the diaphragms alone. Can someone tell me where I can order these? I have looked at both Performance Products and Rusty’s Buy MB parts, and they don’t have them.

Thanks,

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Wayne