Perform Software Update Of E-Call Russia Control Unit - AR82.95-P-0052NKA

Model 117, 156, 166, 172, 176, 190, 205, 217, 218, 222, 231, 246, 253, 292 

with code 6U4 (Mercedes-Benz Ecall emergency call system Russia (GLONASS)) 

Model 463 

up to model year 2019 

with code 6U4 (Mercedes-Benz Ecall emergency call system Russia (GLONASS)) 

Shown on model 166 

Courtesy of MERCEDES-BENZ USA

	Perform update
1	Take micro SD card out of insertion slot (4) and store in a secure location	If installed. When slight pressure is applied to the back of the micro SD card, it slides out of the housing a short distance and can be removed.
2	Switch on ignition	Once flashing has started, it may not be interrupted. The SD card may not be removed if indicator lamps (2) are illuminated or flashing. Otherwise, the eCall Russia (GLONASS) control unit (N167) will not work properly or not at all and there is the risk that the SD card becomes unusable.
3	Insert the micro SD card with the update, with the pins facing up, into the insertion slot (4) on the side of the eCall Russia (GLONASS) control unit (N167)	During the update, the three indicator lamps (2) of the eCall Russia (GLONASS) control unit (N167) light up alternately from left to right or from right to left. This process may not be interrupted and takes approximately 10 minutes. Otherwise, the eCall Russia (GLONASS) control unit (N167) will not work properly or not at all and there is the risk that the SD card becomes unusable. The card only fits into the device in one direction. The card must be inserted and pushed across a small resistance towards the end, then snaps in place and is flush with the housing. After the insertion, an announcement is made stating that the update is being started. At the end of the update, another announcement is made and the red indicator lamp lights up.
		A system check is performed. At the end of the check, the indicator lamps (2) go out.
4	Remove the micro SD card from the insertion slot (4)	When slight pressure is applied to the back of the micro SD card, it slides out of the housing a short distance and can be removed.
5	Perform a systems reset	To do so, the two buttons (1 and 3) must be pressed and held at the same time. After a few seconds, an announcement is made that the reset was done.
6	Switch off ignition
7	Insert the micro SD card that was removed in the beginning back into the insertion slot (4)	If installed. The card only fits into the device in one direction. The card must be inserted and pushed across a small resistance towards the end, then snaps in place and is flush with the housing.