1982 mercedes 300SD remote door locks

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komputodo's picture


Has anyone had any luck installing remote door locks on this model. It seems as if it shouldn't be too difficult with access to the 3 wire pump in the trunk but i cant seem to figure out how the circuit functions. I cut the 3 wires and with jumper wires i get the pump running but it closes and then reopens the locks and then shuts off. Like it goes thru both cycles. I cant seem to figure out how to wire it so it just closes the locks and shuts off. The lock system works perfectly with the key.

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Ed Bellion's picture


I recently had a remote system installed on my
84 300SD, after both door lock cylinders failed.

I had it done at a local specialty place. The technician
said it was quite easy, it cost $150, and has worked
very well since. Then doors also lock and unlock automatically
when the engine is started and stopped.
This saved me over $300 campared to replacing
the door locks.

It may be worth your while to have it done, rather than
spend a lot of time fiddling with it.


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