Data Controller (DC)
Remote Start for Mercedes
2006 - 2009 ML, GL, and R Class
888.820.3690
Welcome to the installation guide for the 2006 to 2009 ML, GL, and R Class Mercedes Benz. Please
thoroughly review this manual before installation as there are details that are essential to operation of
the vehicle. Please don’t forget to review the installation manual included with the DC unit.
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
• Panel Removal Tool
• Drill
• 3/4” Drill Bit
DC Control Module
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Data Controller (DC)
Remote Start for Mercedes
2006 - 2009 ML, GL, and R Class
27. Reinstall the COMAND by first plugging in all harnesses and antenna connections that you
removed in step 7.
28. Slide the COMAND back into its opening.
29. Push up on the radio retaining bars to secure the radio.
30. Reinstall the (2) T-20 screws to secure the radio retention bars.
31. Confirm the proper operation of the COMAND unit.
32. Reinstall the HVAC panel by inserting the top edge of the panel just below the face of the
COMAND unit.
33. Push the bottom edge of the HVAC panel toward the dash.
34. Pull downward to confirm its proper location. If done properly, the upper edge will catch on its
retainer and will not allow it to move downward.
35. Align the opening in the HVAC panel with the slide out drawer at the bottom and provide gentle
pressure to snap the bottom edge into place.
Installation Images
1) Pull out on bottom of HVAC panel
2) Pull down on HVAC panel
Insert panel tool here, one side at a time
3) R class panel removal
4) Remove T-20 screws
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Data Controller (DC)
Remote Start for Mercedes
2006 - 2009 ML, GL, and R Class
888.820.3690
5) Pull down on retaining bars
6) Remove and disconnect COMAND unit
7) Access EIS wiring through opening
8) Make sure the valet switch is off
Factory EIS wiring
External view of EIS module
Starter T-Harness
9) Plug the harness into the rear of the EIS
10) Connect the factory wires to the T-Harness
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Data Controller (DC)
Remote Start for Mercedes
2006 - 2009 ML, GL, and R Class
Installation Complete
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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