diff --git a/config/default/Configuration.h b/config/default/Configuration.h
index be512e371c..4521895fdc 100644
--- a/config/default/Configuration.h
+++ b/config/default/Configuration.h
@@ -158,33 +158,19 @@
 #endif
 
 /**
- * Průša MK2 Single Nozzle Multi-Material Multiplexer, and variants.
+ * Multi-Material Unit
+ * Set to one of these predefined models:
  *
- * This device allows one stepper driver on a control board to drive
- * two to eight stepper motors, one at a time, in a manner suitable
- * for extruders.
- *
- * This option only allows the multiplexer to switch on tool-change.
- * Additional options to configure custom E moves are pending.
- */
-//#define MK2_MULTIPLEXER
-#if ENABLED(MK2_MULTIPLEXER)
-  // Override the default DIO selector pins here, if needed.
-  // Some pins files may provide defaults for these pins.
-  //#define E_MUX0_PIN 40  // Always Required
-  //#define E_MUX1_PIN 42  // Needed for 3 to 8 inputs
-  //#define E_MUX2_PIN 44  // Needed for 5 to 8 inputs
-#endif
-
-/**
- * Průša Multi-Material Unit v2
+ *   PRUSA_MMU1      : Průša MMU1 (The "multiplexer" version)
+ *   PRUSA_MMU2      : Průša MMU2
+ *   PRUSA_MMU2S     : Průša MMU2S (Requires MK3S extruder with motion sensor, EXTRUDERS = 5)
+ *   SMUFF_EMU_MMU2  : Technik Gegg SMUFF (Průša MMU2 emulation mode)
+ *   SMUFF_EMU_MMU2S : Technik Gegg SMUFF (Průša MMU2S emulation mode)
  *
  * Requires NOZZLE_PARK_FEATURE to park print head in case MMU unit fails.
- * Requires EXTRUDERS = 5
- *
- * For additional configuration see Configuration_adv.h
+ * See additional options in Configuration_adv.h.
  */
-//#define PRUSA_MMU2
+//#define MMU_MODEL PRUSA_MMU2
 
 // A dual extruder that uses a single stepper motor
 //#define SWITCHING_EXTRUDER