Front warning indicator
Removal
1. Disconnect the negative (-) battery cable with the ignition off. The cabin air filter box must be removed first.
Before disconnecting the cable, find out the radio receiver's security code, if any, refer to Section Replacing the battery.
2. Using a plastic wedge, e.g. HAZET 1965-20, remove the cover (1) located above the ventilation deflector from the instrument panel (arrows in the illustration), as described in Section Removal and installation ventilation deflectors.
3. Disconnect the warning indicator connector and remove the indicator.
Installation
1. Installation is performed in the reverse order of removal.
2. Connect the battery ground (-) cable with the ignition off. Reinstall the cabin air filter box. If necessary, enter the radio code and set the clock.
Warning sign in the rear
The warning indicator is integrated into the rear ceiling light.
Removal
1. Disconnect the negative (-) battery cable with the ignition off. The cabin air filter box must be removed first.
Warning! Before disconnecting the cable, find out the radio receiver security code, if any, refer to Section Replacing the battery.
2. Using a plastic wedge, remove the ceiling lamp from the trim and detach it from the holders.
3. Disconnect the ceiling light connector and the warning light and remove the ceiling light.
Installation
1. Installation is performed in the reverse order of removal.
2. Connect the battery ground (-) cable with the ignition off. Reinstall the cabin air filter box. If necessary, enter the radio code and set the clock.
Material taken from a web resource [MERCEDESMAN.ru]