diff --git a/Firmware/mmu.cpp b/Firmware/mmu.cpp
index 3d8b4e19..703b5b4c 100644
--- a/Firmware/mmu.cpp
+++ b/Firmware/mmu.cpp
@@ -163,6 +163,13 @@ void mmu_loop(void)
 				mmu_printf_P(PSTR("T%d\n"), extruder);
 				mmu_state = 3; // wait for response
 			}
+			else if ((mmu_cmd >= MMU_CMD_L0) && (mmu_cmd <= MMU_CMD_L4))
+			{
+			    int filament = mmu_cmd - MMU_CMD_L0;
+			    printf_P(PSTR("MMU <= 'L%d'\n"), filament);
+			    mmu_printf_P(PSTR("L%d\n"), filament);
+			    mmu_state = 3; // wait for response
+			}
 			mmu_cmd = 0;
 		}
 		else if ((mmu_last_response + 1000) < millis()) //request every 1s
@@ -480,8 +487,13 @@ void display_loading()
 void extr_adj(int extruder) //loading filament for SNMM
 {
 #ifndef SNMM
-    printf_P(PSTR("L%d \n"),extruder);
-    fprintf_P(uart2io, PSTR("L%d\n"), extruder);
+    uint8_t cmd = MMU_CMD_L0 + extruder;
+    if (cmd > MMU_CMD_L4)
+    {
+        printf_P(PSTR("Filament out of range %d \n"),extruder);
+        return;
+    }
+    mmu_command(cmd);
 	
 	//show which filament is currently loaded
 	
@@ -491,7 +503,7 @@ void extr_adj(int extruder) //loading filament for SNMM
 	//if(strlen(_T(MSG_LOADING_FILAMENT))>18) lcd.setCursor(0, 1);
 	//else lcd.print(" ");
 	lcd_print(" ");
-	lcd_print(mmu_extruder + 1);
+	lcd_print(extruder + 1);
 
 	// get response
 	manage_response(false, false);
diff --git a/Firmware/mmu.h b/Firmware/mmu.h
index 63835ca8..8b338d6c 100644
--- a/Firmware/mmu.h
+++ b/Firmware/mmu.h
@@ -21,6 +21,11 @@ extern int16_t mmu_buildnr;
 #define MMU_CMD_T2   0x12
 #define MMU_CMD_T3   0x13
 #define MMU_CMD_T4   0x14
+#define MMU_CMD_L0   0x20
+#define MMU_CMD_L1   0x21
+#define MMU_CMD_L2   0x22
+#define MMU_CMD_L3   0x23
+#define MMU_CMD_L4   0x24
 
 extern int mmu_puts_P(const char* str);