FT-MB221-DC Installation Guide
Data Controller (DC)
Remote Start for Mercedes
2007 - 2012 CL and S Class
Everything removed
EIS plugs removed
Route plugs to bottom
Instructions for S Class
1. Remove (4) T-25 screws from driver’s underdash panel.
2. Remove (2) plastic fasteners from driver’s underdash panel from either side of the brake pedal.
3. Lower driver’s underdash panel and disconnect underdash light connector.
4. Laying on your back in the footwell reach up to the rear of the EIS (key cylinder) and remove both
plugs, first the black (lower) plug, then the white (upper) plug.
5. Pull the harness containing those plugs down to the lower edge of the dash.
6. Take the ends of the T-Harness that match the ones you just removed and plug them into the rear of
the EIS..
7. Plug each 16 pin connector into the Mercedes DC making sure to match each connector to the
proper plug
8. Plug the remaining two connectors into the plugs you removed in step 4, white first, then black
9. Drill a 3/4” hole to mount the valet switch into the corner of the removed under dash panel closest
to the center of the vehicle.
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