Quote:
Originally Posted by Gene Horr
1) What is supposed to "power" unlock? The fuel cover only, the cover plus the trunk, or everything including the doors?
2) How is the unlock sequence triggered? Merely removing vacuum or does the system require pressurization? It appears to require pressure based upon the action of the fuel cover in my vehicle, the overpressure switch on the pump, and that there doesn't appear to be an electrically activated pressure release in the system.
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1)Trunk, fuel door, all doors
2)IIRC There is an electronic switch in the drivers door lock (and in later models I believe the trunk) that triggers the pump to lock/unlock. If the pump runs too long with out building up (leak) then it will time out and no longer work when triggered until it is reset by disconnecting the battery.
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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver
1982 300SD - 232K miles - Wife's Daily Driver
1986 560SL - Wife's red speed machine
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