Firstech FT-MB221-DC Installation Manual
Data Controller (DC)
Remote Start for Mercedes
www.compustar.com
888.820.3690
2007 - 2009 CL and S Class
FT-MB221-DC Installation Guide
Welcome to the installation guide for the 2007 to 2009 CL and S Class Mercedes Benz. Please
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-25 Torx Driver•
Panel Removal Tool•
Drill•
3/4” Drill Bit•
DC Control Module
Copyright 2010 Firstech, LLC. | 1
Data Controller (DC)
Remote Start for Mercedes
www.compustar.com
888.820.3690
2007 - 2009 CL and S Class
FT-MB221-DC Installation Guide
Instructions for CL Class
1. Open the cup holder in the center console and remove the two rubber stoppers by pulling them
straight up. A pick tool may help you get it started.
2. Remove (2) T-20 Torx screws from below the stoppers.
3. Pull the cup holder straight up and set it aside.
4. Slide the ashtray toward the back of the car so you can tilt it up slightly.
5. Remove the power connector from the lighter socket and remove the ashtray from the console and
set it aside.
6. Using a panel tool, pry up on the vent above the clock to remove it from the cluster bezel.
7. Remove (1) T-25 from under the vent you removed in step 6.
8. Lay a towel or protective mat over the console to give you a place to set the HVAC panel once it’s
removed.
9. Gently pry around the edges of the HVAC bezel to loosen the clips.
10. At the very bottom of the HVAC bezel is a steel bracket that is hooked around a piece of plastic.
Reach under the bottom edge and push up on the plastic while pulling down on the steel bracket
to allow them to separate and release the lower edge of the HVAC panel.
11. Lay the panel face down on your protective mat and disconnect all the connectors. Set the HVAC
panel aside.
12. Remove (4) T-20 screws from the changer, remove the changer from the dash, unplug all the plugs
and set it aside.
13. Reaching through the changer cavity, unplug the 2 plugs from the rear of the EIS, starting with the
black plug which is on the bottom.
14. Follow steps 1-3 of the S Class manual to remove the driver’s under dash panel.
15. Route the harness from the changer cavity to the driver’s under dash area.
16. Route the T-Harness up from the under dash area to the changer cavity.
17. Plug the T-Harness into the rear of the EIS.
18. Insert the plugs into the control module matching the marks on the plug and the connector,
“C1” and “C2.”
19. Plug the other end of the T-Harness into the factory wiring, white plug first, then black.
20. Follow steps 9-16 on the S Class section to power up and test the remote start as well as
reassembling the under dash panel.
21. Lay the HVAC panel face down on the protective cover on the console and reinstall all plugs into
their respective sockets.
22. Snap the HVAC panel back into place on the dash making sure the metal bracket at the very
bottom is snapped past the plastic it hooks on to.
23. Install (1) T-25 Torx screw at the top and reinstall the vent.
24. Slide the ashtray back into place and connect the lighter socket power.
25. Reinstall the cup holder and the (2) T-20 Torx screws that retain it.
26. Reinstall the rubber stoppers that cover the screws.
Copyright 2010 Firstech, LLC. | 2
Data Controller (DC)
Remote Start for Mercedes
2007 - 2009 CL and S Class
Remove rubber stoppers Remove (2) T-20
www.compustar.com
888.820.3690
FT-MB221-DC Installation Guide
Remove cup holder Remove ashtray
Ashtray removed Pry up on vent
Copyright 2010 Firstech, LLC. | 3
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