Mercedes & aftermarket keyless entry

I researching installing an aftermarket alarm (Clifford) on a 1995 Mercedes C-Class. However, there seems to be a slight conflict in the documentation available on this. The general vacuum lock information mentions a single "central vacuum lock" wire that changes polarity depending on lock status. There is a diagram documenting how to cut this wire and incorporate 2 relays to make the keyless entry fuction. (I can't find this wire.) However, the wiring info on this site and others mentions two wires (I've found these wires.): Power Lock:    BLACK (-) DRIVER'S KICK PANEL Power Unlock:    BLUE (-) DRIVER'S KICK PANEL OR TRUNK NOTE: I did some testing. Both wires rest at 12 volts and go to 0 volts when driver side key turned for lock or unlock. What wires and diagram do I use? Thanks, Jeff

I have:

Power Lock	BLACK	DRIVER KICK
Power Unlock	BLUE	PANEL  **

* Split Parking Light System - Must Use Two S.P.D.T. Relays Or Two 6 Amp Diodes To Isolate.              **Negative Pulse Door Lock  MO

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This is new information. Thank you MO! So, am I to assume that I use the two relays to isolate a 3.5 sec pulse to ground for each wire (depending on lock or unlock)? Am I close?

U can use the LOCK /UNLOCK wires from your unit (if they have Negative pulse) or the relays (for a better Ground)MO

Don't Learn from Others Mistakes

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Thank you again MO! Where did you get this information? Is there a site I can reference too? It looks like this is considered a "Type B - negative pulse" system in the Clifford manual. Is this correct as far as you know?