1. Open the hood by releasing the lever on the drivers side. Loosen up the bolt that secures the negative battery cable to the battery, and remove the cable from the battery.
2. Pull the dash panel from the dash and reach behind the panel and pop the headlamp control switch from the panel.
3. Detach the main dash panel from the dashboard and locate the two levers on the sides of the factory radio. Pull down these two levers and the radio will release from the bracket. Remove the radio from the dock and also remove the stereo wiring plus the antenna cable from the rear of the system.
4. Slide the aftermarket CD players installation sleeve into the stereo dock. Pull the stereo wiring and antenna cable to the front of the dashboard. Fold the metal tabs of the sleeve outward to bind it within the dock.
5. Locate the wiring harness adapter leads and insert the units wiring connectors into these leads. Connect the antenna cable lead into the antenna adapter and insert the wiring harness adapter lead connectors into the correct outlets, which are found on the rear of the CD changer unit. Take the antenna adapter lead and insert it into the FM antenna input on the back of the new CD unit.
6. Slide the CD changer into the installation sleeve and listen for the snap sound; this means it is now secured in the stereo dock. Snap the dashboard panel back into place by pushing it firmly against the dash. Before pushing the left side of the panel into place, make sure you replace the headlamp control into the opening on the drivers side of the dash panel. Move on to the vehicles battery.
7. Put the negative battery cable clamp onto the negative battery terminal and with the aid of a wrench, tighten the bolt on the clamp. Close the hood of the Mercedes.