Since there is NO vacuum actuator in the driver's door on 1rst gen. 126 chassis; only a key/int. knob actuated switch (to vacuum pump in trunk); you must use an electric actuator in the driver's door. This electric actuator will be activated by the keyless system and in turn activate the pump and in turn the pump activates the vacuum locks in the other doors and trunk.

No wiring to pump in the trunk needed (or wanted) in 1rst gen 126.

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The Golden Rule

1984 300SD (bought new, sold it in 1988, bought it back 13 yrs. later)