M.T.H. Premier Bavarian Class 3/6 Express Operator's Manual page 27

If you have performed the 55-55-55 reset and the engine still doesn't respond
then place the engine on the programming track output of your DCC system and program
a value of 3 to CV1. This will set the engine's short address to 3. However, as long as the
engine is NOT programmed as address 55 then the 55-55-55 reset will always set the
engine's long and short addresses back to their factory defaults. It will also set the engine's
addressing back to short (if you happened to have CV29 set to long addressing)
The 55-55-55 Reset can be confusing at first but the main point to note is that you are
NOT setting the engine's address to 55 to perform the reset, you are just calling up engine
address 55 on your DCC handheld and sending a value of 55 to CV55. Again, MTH
engine's will listen to the 55-55-55 reset command even though the engine's address isn't
actually 55 (and it can't be for the 55-55-55 reset to work).
Premier Bavarian Class 3/6 Express Steam Locomotive
talking to engine address 55. You will want to make sure that no
other MTH engines are on the rails or any other manufacturer's
engines with an address of 55 are on the rails. MTH engines will
listen for commands coming to engine address 55 when the 55-55-55
reset is enabled even though they are not programmed as address 55
Enter PoM mode on your DCC handheld and write a value of 55 to
CV55. Again, even though your MTH engine is NOT on address 55 it
will still listen for this reset command
Call up address 3 on your DCC handheld and hit F3. The engine
should now start-up
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