To get the RED wire down the channel to the trunk light, use a piece of stiff wire, such as a cloths hanger to pull the red wire through the final cavity. Push the stiff pulling wire through the trunk light hole in the direction of the hinge and find where it comes out.  …You’ll soon work it out! (Picture # 4)

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Then use some scotch tape to temporally tie the RED wire to the stiff wire, and pull the Red wire back through the cavity, in the direction of the trunk light. Make sure the RED wire doesn’t foul when the trunk lid is closed. You need to check it very well. ALWAYS have the RED wire parallel to the spring.

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Once you have pulled the Red wire through the cavity to behind the trunk light, take the paddle doubler provided, and place it on the light fixture terminal that has the Positive cables (Red Strip). Now re-connect the Positive wire (Red Stripe) from the car chassis/light fixture to the paddle doubler together with the RED wire from the relay. Make sure the wires and paddle connectors do not protrude or sit to high, because if they touch the car chassis it will short out and blow your fuses. (Picture # 5)

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Re-install the trunk light lens fixture in its hole, making sure the connectors clear the car chassis.

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Now test to see if the Relay is working correctly before proceeding.

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Re-connect your car battery. Take the ORANGE wire from the relay, and touch the car chassis (body) where there is no paint, like on a screw. (Not the taillight screws, as they are mounted in plastic and not grounded to chassis).  You should hear the relay make a clicking sound. If you don’t hear the relay activating (clicking), then check the following:

-          You possibly connected to the wrong terminal in the trunk light

OR

-          If your trunk light has now stopped working, the paddle connectors are probably touching the car chassis (body) and have shorted out, causing your trunk light fuse # C in the engine fuse compartment to blow. (Did you hear a fuse blow when you connected the battery?)

Proceed only when you have tested the relay is functioning. (You hear it clicking)

Next, hook up the Parking Lights to the relay.

Mercedes Purist: In order not to use a wiretap, solder the WHITE wire from the 12-volt relay to pin # 6 on the six-pin taillight connector. Or install everything and then get an auto-electrician to solder this one connection. Or use the red wiretap provided. (It's only one wiretap after all).

If you are using the wiretap, strip one inch of the black plastic sheath about two inches from the six-pin connector, and find the parking light cable which is colored GREY / RED STRIPE.

On the PASSENGERS side taillight  the wire should be GREY / RED STRIPE,

(On the Drivers Side taillight the wire should be Grey / Red Black Stripe.)

Take the red plastic wiretap provided and place the parking light cable described above, into the long channel on the wiretap, and the WHITE wire from the relay in the only hole at one end of the wiretap. With some pliers, crush the center pin into the wiretap. Close the plastic cover on the wiretap when finished. (If you can solder, you can solder directly to the back of pin # 6 of the six-pin plug and not use the wiretap)

Now test it is working. Again, take the ORANGE wire from the relay and touch the car chassis (body) on a no paint area or screw. You should see all four Parking Lights Illuminate.If it didn’t work, then check the following:

--          If the lights are not illuminating, but you hear the Relay click, then the wiretap on the tail light fixture did not make a good connection.

OR

-          You connected the wiretap to the wrong tail light wire in the group of six wires, and the reversing or brake lights are illuminating, or you blew a fuse. In this case, open the back of the black six-pin taillight plug and find the correct color wire. The wire connected to pin # 6 is correct. (Picture # 2).

Now plug the connector on the ORANGE wire from the relay into the connector plug on the BROWN wire coming from the Keyless control box. 

Close the doors, trunk and hood, and lock the car with the Remote. The lights should flash once upon locking and flash once then illuminate for 15 seconds upon un-locking.

Neaten up and hide all loose cables behind the trunk lining once you have checked everything is working.

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