Data Controller (DC)
Remote Start for Mercedes
KeylessGo
888.820.3690
Welcome to the installation guide for the KeylessGo portion of the remote start for Mercedes. Please
thoroughly review this manual before installation as there are details that are essential to operation of
the vehicle.
This manual is intended for experienced installers. Firstech recommends professional installation as
we are not responsible for improper use and/or installation. For questions please call 888-820-3690
Monday through Friday 8 am to 5 pm PST.
Required Parts and Tools
• T-20 Torx Driver
• Pick Tool
• Panel Removal Tool
• Digital Multimeter
• 10K Ohm Resistor
Mercedes Benz vehicles that have a push button for starting will require the KeylessGo harness. (Part
number: FT-MBKG20-HRN) This will let the user lock and unlock their vehicle from DroneMobile, 2
or 1 Way remote or factory key fob during remote start. This harness must be ran to the KeylessGo
module to a separate CAN connector in the vehicle. The other end of the harness plugs into the 2
pin KeylessGo port on the DC for Mercedes control module.
Note: You must install the DC control module and DroneMobile or RF kit before connecting the
KeylessGo harness. Also don’t forget to test functionality of the remote start.
Instructions
1. Locate the CAN distribution block that houses the KeylessGo connector. (See table below)
2. Unplug all connectors from the block that contain brown and brown/red twisted CAN wires.
3. Locate the KeylessGo module. (See table below)
4. Unplug the KeylessGo module.
5. Unclip and remove the connector cover from the KeylessGo connector.
6. Locate the twisted brown and brown/red CAN wires in the plug.
7. Insert a 10kΩ ohm resistor between the brown and brown/red wires in the connector.
8. Using your meter, measure the resistance between the two wires on each plug at the CAN block
that were unplugged in step 2 until you find the plug that reads 10kΩ ohm across the two wires.
9. Plug all the other connectors back into the CAN block except for the KeylessGo connector that you
located in step 8.
10. Using a pick tool or small flat blade, open the retaining clip that holds the connecting terminals
on the side of the connector housing.
11. Using a pick tool or small flat blade release the tabs on each pin and remove them from the
connector housing. The release tab will need to be pressed down two separate times to remove it
from the connector housing.
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Data Controller (DC)
Remote Start for Mercedes
KeylessGo
888.820.3690
KeylessGo Component Locations
C and E Class module locations.
C and E Class
KeylessGo Module
KeylessGo plug
on module in
trunk
Plug removed - faces body of car
E coupe KeylessGo module -- right rear of trunk
C and E Sedan KeylessGo module -- right rear trunk
CAN connector, E, C, GLK class under plastic
passenger front door
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Data Controller (DC)
Remote Start for Mercedes
KeylessGo
888.820.3690
CL and S Class module locations.
CL and S Class
CAN Connector
KeylessGo Module
Right rear corner of trunk
Under rear of driver’s seat
GL, ML, and R Class module locations.
GL, ML, and R Class
KeylessGo Module
CAN Connector
GL -- right rear side of cargo compartment
R KeylessGo module -- under cargo area floor
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Data Controller (DC)
Remote Start for Mercedes
KeylessGo
888.820.3690
GL, ML, and R Class
ML KeylessGo -- right rear side of cargo
compartment
ML and R CAN distribution block, front passenger
kick panel
KeylessGo Component Locations
Pin Removal and Reinstall
CAN plug removed
Release retaining clip
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Data Controller (DC)
Remote Start for Mercedes
KeylessGo
888.820.3690
Pin Removal and Reinstall
Remove pins from connector housing
Pins removed, connector housing empty
Empty connector housing reinstalled
Pins ready for new connector housing
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Data Controller (DC)
Remote Start for Mercedes
KeylessGo
888.820.3690
Pin Removal and Reinstall
Brown Matches Brown
Brown/Red Matches Brown/Red
Plugs matched up and completed
Pins installed in connector housing
That completes the KeylessGo portion of your installation. Please see the vehicle specific installation guide
for more information.
Firstech, LLC. is not responsible for any damages whatsoever, including but not limited to any consequential
damages, incidental damages, damages for loss of time, loss of earnings, commercial loss, loss of economic
opportunity and the like that may or may not have resulted from the installation or operation of the Data
Controller for Mercedes.
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