diff --git a/Firmware/mmu.cpp b/Firmware/mmu.cpp
index 2f7bf96c..1c0e0a41 100644
--- a/Firmware/mmu.cpp
+++ b/Firmware/mmu.cpp
@@ -223,7 +223,12 @@ void mmu_loop(void)
 			if (!version_valid) mmu_show_warning();
 			else puts_P(PSTR("MMU version valid"));
 
-			if ((PRINTER_TYPE == PRINTER_MK3) || (PRINTER_TYPE == PRINTER_MK3_SNMM))
+			bool activate_stealth_mode = (eeprom_read_byte((uint8_t*)EEPROM_SILENT) == SILENT_MODE_STEALTH);
+#ifdef MMU_STEALTH_MODE
+			activate_stealth_mode = true;
+#endif //MMU_STEALTH_MODE
+
+			if (!activate_stealth_mode)
 			{
 				FDEBUG_PUTS_P(PSTR("MMU <= 'P0'"));
 				mmu_puts_P(PSTR("P0\n")); //send 'read finda' request
diff --git a/Firmware/variants/1_75mm_MK25-RAMBo10a-E3Dv6full.h b/Firmware/variants/1_75mm_MK25-RAMBo10a-E3Dv6full.h
index a9dcefe4..dd836b69 100644
--- a/Firmware/variants/1_75mm_MK25-RAMBo10a-E3Dv6full.h
+++ b/Firmware/variants/1_75mm_MK25-RAMBo10a-E3Dv6full.h
@@ -498,7 +498,8 @@
 //#define SUPPORT_VERBOSITY
 
 #define MMU_REQUIRED_FW_BUILDNR 132
-//#define MMU_DEBUG //print communication between MMU2 and printer on serial
+#define MMU_STEALTH_MODE
+#define MMU_DEBUG //print communication between MMU2 and printer on serial
 
 #define MMU_IDLER_SENSOR_ATTEMPTS_NR 21 //max. number of attempts to load filament if first load failed; value for max bowden length and case when loading fails right at the beginning
 
diff --git a/Firmware/variants/1_75mm_MK25-RAMBo13a-E3Dv6full.h b/Firmware/variants/1_75mm_MK25-RAMBo13a-E3Dv6full.h
index 38d18134..9715aa7d 100644
--- a/Firmware/variants/1_75mm_MK25-RAMBo13a-E3Dv6full.h
+++ b/Firmware/variants/1_75mm_MK25-RAMBo13a-E3Dv6full.h
@@ -499,7 +499,8 @@
 //#define SUPPORT_VERBOSITY
 
 #define MMU_REQUIRED_FW_BUILDNR 132
-//#define MMU_DEBUG //print communication between MMU2 and printer on serial
+#define MMU_STEALTH_MODE
+#define MMU_DEBUG //print communication between MMU2 and printer on serial
 
 #define MMU_IDLER_SENSOR_ATTEMPTS_NR 21 //max. number of attempts to load filament if first load failed; value for max bowden length and case when loading fails right at the beginning
 
diff --git a/Firmware/variants/1_75mm_MK25S-RAMBo10a-E3Dv6full.h b/Firmware/variants/1_75mm_MK25S-RAMBo10a-E3Dv6full.h
index 53b545e8..b814d1cb 100644
--- a/Firmware/variants/1_75mm_MK25S-RAMBo10a-E3Dv6full.h
+++ b/Firmware/variants/1_75mm_MK25S-RAMBo10a-E3Dv6full.h
@@ -498,7 +498,8 @@
 //#define SUPPORT_VERBOSITY
 
 #define MMU_REQUIRED_FW_BUILDNR 132
-//#define MMU_DEBUG //print communication between MMU2 and printer on serial
+#define MMU_STEALTH_MODE
+#define MMU_DEBUG //print communication between MMU2 and printer on serial
 
 #define MMU_IDLER_SENSOR_ATTEMPTS_NR 21 //max. number of attempts to load filament if first load failed; value for max bowden length and case when loading fails right at the beginning
 
diff --git a/Firmware/variants/1_75mm_MK25S-RAMBo13a-E3Dv6full.h b/Firmware/variants/1_75mm_MK25S-RAMBo13a-E3Dv6full.h
index e786b70f..3f38a286 100644
--- a/Firmware/variants/1_75mm_MK25S-RAMBo13a-E3Dv6full.h
+++ b/Firmware/variants/1_75mm_MK25S-RAMBo13a-E3Dv6full.h
@@ -499,7 +499,8 @@
 //#define SUPPORT_VERBOSITY
 
 #define MMU_REQUIRED_FW_BUILDNR 132
-//#define MMU_DEBUG //print communication between MMU2 and printer on serial
+#define MMU_STEALTH_MODE
+#define MMU_DEBUG //print communication between MMU2 and printer on serial
 
 #define MMU_IDLER_SENSOR_ATTEMPTS_NR 21 //max. number of attempts to load filament if first load failed; value for max bowden length and case when loading fails right at the beginning