Good Sam Community

On my 2005 Vectra 36RD the side panel (beside the sofa) pulls off (it's held on with clips). I don't know if you can actually get it off without removing the sofa, however.

If you take a look at the Brochure for your RV here you can compare how it looks in the pictures with what you see for your coach.

This thread over on winnieowners.com might be helpful: Floor light bulb

If instead of the MMDC your coach has the earlier VDU I would recommend contacting FCCC (Freightliner Custom Chassis Corp) Customer Service (1-800-385-4357) to find out if that info is accessible to you on your coach.

If you do have an MMDC the menu item you're ultimately looking for is called "ECU vs IP" under "Service/Diagnostics/(PW=8127)/Sender"