Check HERMES Control Unit (Code: VS2SIMKOW, Acc. No.: 54 963 42) - SM82.95-S-0025A

Model 447.603/605/703 13 as of 153001 up to 913143 

with code JH3 (Communication module (LTE) for digital services) 

with code ZU8 (National version for USA) 

Shown on model 447.6/7 

Courtesy of MERCEDES-BENZ USA

Courtesy of MERCEDES-BENZ USA

Shown on model 447.6/7 

Courtesy of MERCEDES-BENZ USA

Shown in XENTRY Diagnosis (in English) 

Courtesy of MERCEDES-BENZ USA

Shown in XENTRY Diagnosis (in English) 

Notice	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
Notice	Notes on carrying out repair work in the vehicle interior		AH68.00-D-0001-01KOS
	Notes on programming control units		AH54.21-P-0001-03Z
	Notes on SCN coding of control units		AH54.21-P-0004-01X
	Check
1	Check whether vehicle is affected by measure.	For authorized Mercedes-Benz service partners, only the entry in the "Extended VEGA Application" (EVA) system, in the "Current" tab is decisive. There is no need to also check the affected vehicles in the workshop information system (WIS) or vehicle list.
	Installing
2	Install the 12 V charger.
			AR54.10-S-1127E
		A sufficient power supply for the on-board electrical system battery must be guaranteed throughout the entire work procedure. Otherwise any undervoltage that occurs may damage the control units. Follow the operating instructions for the 12 V charger. Use the 12 V charger to ensure an adequate voltage (min. 12.5 V) for the on-board electrical system battery.
3	Connect diagnostic system.
			AD00.00-S-2000-04E
		Always make sure that XENTRY Diagnosis is updated to the latest version. The operation steps in XENTRY Diagnosis must be followed precisely at all times.
	Check data of SIM card
4	Check data of SIM card in HERMES control unit (N112/9).	"FFFFFFFFFFFFFF"  must be shown under the current actual value of the "ICCID" fields (no. 819) and "IMSI" (Nr. 072). To do this, select the following menu items: Quick test view → N112/9 'Telematics services' (HERMES) communication module (code: JH3) → Actual values → Activation status If XENTRY Diagnosis shows "FFFFFFFFFFFFFF" for both actual values "ICCID" (No. 819) and "IMSI" (No. 072), ↓ continue with operation step 8. If XENTRY Diagnosis does not show "FFFFFFFFFFFFFF" for both actual values "ICCID" (No. 819) and "IMSI" (No. 072), ↓ continue with operation step 5. If communication between XENTRY Diagnosis and the HERMES control unit (N112/9) fails, disconnect and connect the ground line of the onboard electrical system battery. If the problem persists, ↓ continue with operation step 8.
			AR54.10-S-0003E
	Commissioning of control unit
5	Perform commissioning of HERMES control unit (N112/9) using vehicle diagnosis system.	Only if XENTRY Diagnosis does not show "FFFFFFFFFFFFFF" for both actual values "ICCID" (No. 819) and "IMSI" (No. 072).
	Programming of control units		AR54.21-S-0014E
		To do this, select the following menu items: Quick test view → N112/9 'Telematics services' (HERMES) communication module (code: JH3) → Adaptations → Commissioning → Initial startup of already installed control unit It is absolutely essential to precisely follow the operation steps as described in the vehicle diagnosis system. The software update in the HERMES control unit (N112/9) can take several hours.  Do not yet remove vehicle diagnosis system.
	Check
6	Make sure that the vehicle has satisfactory cellular telephone system reception.	Only if XENTRY Diagnosis does not show "FFFFFFFFFFFFFF" for both actual values "ICCID" (No. 819) and "IMSI" (No. 072). To do this, select the following menu items: Quick test view → N112/9 'Telematics services' (HERMES) communication module (code: JH3) → Actual values → Cellular telephone system and data communications The current actual value of the "Signal level of cellular telephone system service" field (No. 026) must be above 80%. If the current actual value of the "Signal level of cellular telephone system service" field (No. 026) is below 80%, move the vehicle outside to improve mobile phone reception. The lower the cellular telephone system reception, the higher the probability that the update of the data for the SIM card in the HERMES control unit (N112/9) (over-the-air update (OTA update)) will not be successful.
	Update SIM card data
7	Update SIM card data in HERMES control unit (N112/9) via over-the-air update (OTA update).	Only if XENTRY Diagnosis does not show "FFFFFFFFFFFFFF" for both actual values "ICCID" (No. 819) and "IMSI" (No. 072) and the current actual value of the "Signal level of cellular telephone system service" field (No. 026) is above 80%.
			SM82.95-S-0025-03A
		Ignition must be switched on. If the update was successful, ↓ continue with operation step 16. If, after about 7 minutes or after starting 3 times in succession, the update was unsuccessful, ↓ continue with operation step 8.
	Remove
8	Switch off ignition and store transmitter key outside of the transmission range (for at least 2 minutes).	Only if, after about 7 minutes or after starting 3 times in succession, the SIM card data in the HERMES control unit (N112/9) was not successfully updated.
9	Remove left cover under the dashboard.	Only if, after about 7 minutes or after starting 3 times in succession, the SIM card data in the HERMES control unit (N112/9) was not successfully updated.
		Model 447.6/7 with code LC7 (Front footwell illumination) with code ZU8 (USA national version)	AR68.10-S-1500E
10	Disconnect electrical connectors (1).	Only if, after about 7 minutes or after starting 3 times in succession, the SIM card data in the HERMES control unit (N112/9) was not successfully updated.
11	Release front and rear lock on holder (2) and take HERMES control unit (N112/9) out to one side.	Only if, after about 7 minutes or after starting 3 times in succession, the SIM card data in the HERMES control unit (N112/9) was not successfully updated. Dispose of removed HERMES control unit (N112/9) properly. Observe the applicable legal requirements and specifications of the relevant country.
	Install
12	Install new HERMES control unit (N112/9) on holder (2) and lock.	Only if, after about 7 minutes or after starting 3 times in succession, the SIM card data in the HERMES control unit (N112/9) was not successfully updated.
13	Connect electrical connectors (1).	Only if, after about 7 minutes or after starting 3 times in succession, the SIM card data in the HERMES control unit (N112/9) was not successfully updated.
14	Install left cover below the instrument panel.	Only if, after about 7 minutes or after starting 3 times in succession, the SIM card data in the HERMES control unit (N112/9) was not successfully updated.
		Model 447.6/7 with code LC7 (Front footwell illumination) with code ZU8 (USA national version)	AR68.10-S-1500E
	Commissioning of control unit
15	Perform commissioning of HERMES control unit (N112/9) using vehicle diagnosis system.	Only if, after about 7 minutes or after starting 3 times in succession, the SIM card data in the HERMES control unit (N112/9) was not successfully updated.
	Programming of control units		AR54.21-S-0014E
		To do this, select the following menu items: Quick test view → N112/9 'Telematics services' (HERMES) communication module (code: JH3) →
		Adaptations → Commissioning → Control unit replacement with initial startup of new control unit It is absolutely essential to precisely follow the operation steps as described in the vehicle diagnosis system. The software update in the HERMES control unit (N112/9) can take several hours.  Do not yet remove vehicle diagnosis system.
	Check
16	Perform function test of HERMES control unit (N112/9) using XENTRY Diagnosis.	To do this, select the following menu items: Quick test view → N112/9 'Telematics services' (HERMES) communication module (code: JH3) → Actuations → Self test The operation steps in XENTRY Diagnosis must be followed precisely at all times.
17	Perform function test of emergency call system.	To do so, switch on ignition without touching brake pedal and check if the "SOS NOT READY" warning message disappears automatically in the instrument cluster. Model 447.6/7 with code E3C (Audio 30) or code EA4 (Audio 40) or code EN6 (Audio 10) or code EN7 (Audio 15) On these vehicles, switch on the radio and check if "SOS NOT READY" appears in the central display of the radio, and then check if shortly after this "SOS NOT READY" automatically disappears from the central display.
	Remove
18	Remove vehicle diagnosis system.
			AD00.00-S-2000-04E
19	Remove charger from vehicle.
			AR54.10-S-1127E