I do not have the answer


on our 86 SDL we had the clicking issue. It sounded exactly like a turn signal.

We think its a vacuum issue. A sensor gets the message to switch to another flap configuration and the sensor never gets the message that the transition has completed so it clicks over again, and again, and gives up, or succeeds.


When we switched out the pushbutton unit with one from a 420sel and everything changed. SO....we still don't know.

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77' 300D, "Cartman" SOLD @ 150K (didn't know what I had)
83' 300SD, "The Superdon" 325k+ @ 28mpg
95 E320 wagon, "Millennium Falcon" 231k+ @ 24 Mpg
95 E300D, "Sherley" 308k @ 33.69 Mpg, currently anticipating a head
99 Suzuki Intruder "Trudy" @ 45 mpg