Direct Wire GPS Mount + EZPass Holder for Benz C240




Introduction: Direct Wire GPS Mount + EZPass Holder for Benz C240

Last one for the Toyota was too easy & not enough pics. This time I draw inspirations from Apple !

Materials needed:

- 4" x 12" Balsa ply wood
- 5/8" wooden ball
- 1/2" wooden dowel
- Black spray paint
- Cig light socket
- 5' thin gauge wire

Total cost ~ $10

Step 1: Looks Like a IMac G4 ?

Can't tap into dome light this time. Benz has rain & light sensors near the mirrors, can't risk it.
So dash mount this time.

Step 2: Build the Mount/holder

Cut sheets into box dimension of EZPass tag. Dowel should be glue + nail/screw in. Glue & clamp down to dry

Also spray painted black to match interior.

Step 3: Tap Into Lighter Socket

How to tap into light socket here ? Lots of removals needed !!

Start with the bottom rubber cup holder. Use a small screw driver, push open the edge of the rubber cup holder. Slip in a needle nose pliers & pull it out.

Step 4: Cup Holder Removal

Be firm but gentle here. This is an expensive part !!

Eject the cup holder. Hold the cup stem, pull up a bit, then rotate clock-wise. It'll come out, trust me ...

Step 5: Remove Shifter Console

Open ash tray door. Grab the top left & left edge of wood insert & pull up; then remove the leather shift boot.

Step 6: Remove Ash Tray

Yet another expensive part !

Open the door, insert small screw driver to the 2 bottom tabs & push back to unlock. Pull the ash tray out

Step 7: Tap Into Lighter Harness

Push up to unlock the 2 tabs. Finally, the lighter mount can be swing back.

You don't need to disconnect the car battery, just be sure key removed !!

Grab the L-shape lighter connector with needle nose pliers, pull right to remove.
Open the connector & tap wires in.

Black/yellow is HOT
Blown is ground

Close connector & reconnect to light socket.

Step 8: Run Power Line

I picked the arm rest console to stash the charger ...
Quickest way is to run power wire outside, then back in.

Step 9: Connect Car Charger

Benz W203 have a/c vents in the arm rest storage bin, so just widen it for power line in & GPS charger line out.

Push both seats way back.
Remove felt-like padding on storage bin (similar to steps in rubber pads in cup holder)
Drill/cut out vent grill (upper right)

Feed in power wire from light, connect to socket, feed out charger end.

*** Test polarity with multimeter, compare with existing socket before connecting anything ***

If tested OK, tape up everything.

Step 10: Run Charger Cable to Dash

Put everything back in center console

Tuck newly ran wires between center console & carpeting.

*** Too tired by now ... no mood to remove radio console & A/C vent ***

Cheated & drill thru glove compartment. I now have 4" of dangle wire instead of 3 feet.

Happy for now ....

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    12 years ago on Introduction

    Very nice instructable! The position is just right. Not too near and not too far either. I saw some gps installations that are pretty much on the wrong location on the dash.


    Reply 11 years ago on Introduction

    I've since moved it to left hand side, just behind the NY State stickers. Ran the USB wires under behind the console & thru the A pillar.

    Even less intrusive now :)