While in Maintenance Mode on the MFD, if the L4 button is empty, check the software part number at the top of the page. 

The last three digits identify the aircraft:

-000 Piper PA46, PA34

-002 Piper PA28, PA32, PA44

-100 Cirrus

-200 Columbia (Lancair)

-500 Aftermarket (with Radar)

-502 Aftermarket (without Radar)

The example below shows the MFD Maintenance Mode missing the configuration buttons for L4 and L5 (Engine and TAWs) that appears in other aircraft. 

Contact Techsupport for assistance with replacing the software card. Please have your PO number or Avidyne sales order number.