Remove/Install Head Unit Hard Drive - AR82.85-P-1102A

Model 118, 167, 177, 213, 238, 243, 247, 253, 257, 290, 293 

with code 548 (Connect 20 MID (NTG6)) 

Model 118, 167, 177, 213, 238, 243, 247, 253, 257, 290, 293 

with code 549 (Connect 20 HIGH (NTG6)) 

Fig 1: Head Unit Hard Drive Components Location - Model 247 With Code 548, 549

Courtesy of MERCEDES-BENZ USA

Topical note	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Remove
1	Remove head unit (A26/17).	Model 253 (except 253.992/993) as of model year 2020 with code 548 (Connect 20 MID (NTG6)) Model 253 (except 253.992/993) as of model year 2020 with code 549 (Connect 20 HIGH (NTG6))	AR82.85-P-1101LWX
		Model 253.992/993 with code 548 (Connect 20 MID (NTG6)) Model 253.992/993 with code 549 (Connect 20 HIGH (NTG6))	AR82.85-P-1101RFW
		Model 167 with code 548 (Connect 20 MID (NTG6)) Model 167 with code 549 (Connect 20 HIGH (NTG6))	AR82.85-P-1101ME
		Model 118, 177, 243, 247 with code 548 (Connect 20 MID (NTG6)) Model 118, 177, 243, 247 with code 549 (Connect 20 HIGH (NTG6))	AR82.85-P-1101MFA
		Model 293 with code 548 (Connect 20 MID (NTG6)) Model 293 with code 549 (Connect 20 HIGH (NTG6))	AR82.85-P-1101EQ
		Model 213, 238 with code 548 (Connect 20 MID (NTG6)) Model 213, 238 with code 549 (Connect 20 HIGH (NTG6))	AR82.85-P-1101LWE
		Model 257, 290 with code 548 (Connect 20 MID (NTG6)) Model 257, 290 with code 549 (Connect 20 HIGH (NTG6))	AR82.85-P-1101FR
2	Place head unit (A26/17) onto ESD kit and prepare as per instructions on potential equalization.	ESD kit	Fig 2
3	Remove screw (2) of head unit hard drive (1).
4	Slide head unit hard drive (1) in direction of arrow (a) until the position arrows (3, 4) face each other.
5	Carefully lift and remove head unit hard drive (1).
	Install
6	Carefully position new head unit hard drive (1) on head unit (A26/17).	Position head unit hard drive (1) so that the position arrows (3, 4) face each other. Otherwise, the head unit hard drive (1) may be damaged during installation.
7	Slide head unit hard drive (1) in direction of arrow (b) until the screw (2) can be positioned.	Make sure that the head unit hard drive (1) is seated correctly. Otherwise, when sliding in the direction of the arrow (b), the connection contacts may be damaged.
8	Screw in bolt (2).
9	Remove ESD kit.
10	Install head unit (A26/17).	Model 253 (except 253.992/993) as of model year 2020 with code 548 (Connect 20 MID (NTG6)) Model 253 (except 253.992/993) as of model year 2020 with code 549 (Connect 20 HIGH (NTG6))	AR82.85-P-1101LWX
		Model 253.992/993 with code 548 (Connect 20 MID (NTG6)) Model 253.992/993 with code 549 (Connect 20 HIGH (NTG6))	AR82.85-P-1101RFW
		Model 167 with code 548 (Connect 20 MID (NTG6)) Model 167 with code 549 (Connect 20 HIGH (NTG6))	AR82.85-P-1101ME
		Model 118, 177, 243, 247 with code 548 (Connect 20 MID (NTG6)) Model 118, 177, 243, 247 with code 549 (Connect 20 HIGH (NTG6))	AR82.85-P-1101MFA
		Model 293 with code 548 (Connect 20 MID (NTG6)) Model 293 with code 549 (Connect 20 HIGH (NTG6))	AR82.85-P-1101EQ
		Model 213, 238 with code 548 (Connect 20 MID (NTG6)) Model 213, 238 with code 549 (Connect 20 HIGH (NTG6))	AR82.85-P-1101LWE
		Model 257, 290 with code 548 (Connect 20 MID (NTG6)) Model 257, 290 with code 549 (Connect 20 HIGH (NTG6))	AR82.85-P-1101FR
11	Perform commissioning of head unit hard drive (1).
		Model 213, 253 with code 548 (Connect 20 MID (NTG6)) Model 213, 253 with code 549 (Connect 20 HIGH (NTG6))	AD00.00-P-2000-04B
		Model 118, 177, 243, 247 with code 548 (Connect 20 MID (NTG6)) Model 118, 177, 243, 247 with code 549 (Connect 20 HIGH (NTG6))	AD00.00-P-2000-06MFA
		Model 257, 290, 293 with code 548 (Connect 20 MID (NTG6)) Model 257, 290, 293 with code 549 (Connect 20 HIGH (NTG6))	AD00.00-P-2000-06FR
		Model 167 with code 548 (Connect 20 MID (NTG6)) Model 167 with code 549 (Connect 20 HIGH (NTG6))	AD00.00-P-2000-06ME
		Model 238 with code 548 (Connect 20 MID (NTG6)) Model 238 with code 549 (Connect 20 HIGH (NTG6))	AD00.00-P-2000-06LWO
12	Update map data for navigation system.
		Model 167, 213, 238, 257, 290 with code 548 (Connect 20 MID (NTG6)) Model 167, 213, 238, 257, 290 with code 549 (Connect 20 HIGH (NTG6))	AP82.85-P-8251A
		Model 253 with code 548 (Connect 20 MID (NTG6)) Model 253 with code 549 (Connect 20 HIGH (NTG6))	AP82.85-P-8251D
		Model 118, 177, 247 with code 548 (Connect 20 MID (NTG6)) Model 118, 177, 247 with code 549 (Connect 20 HIGH (NTG6))	AP82.85-P-8251E
		Model 293 with code 548 (Connect 20 MID (NTG6)) Model 293 with code 549 (Connect 20 HIGH (NTG6))	AP82.85-P-8251F
		Model 243 with code 548 (Connect 20 MID (NTG6)) Model 243 with code 549 (Connect 20 HIGH (NTG6))	AP82.85-P-8251H

Fig 2: Identifying ESD Kit (000 589 52 98 00)

Courtesy of MERCEDES-BENZ USA