Remove/Install Touchpad Control Unit - AR54.21-P-0503LW

Model 205, 213, 238, 253 (except 253.992/993)

with code 448 (Touchpad)

except code 446 (Touchpad only)

MODIFICATION NOTES

08.01.2018

"Perform commissioning of touchpad (A105)" added.

Operation step 1

Shown on Audio/COMAND control panel (A40/9) with transmission 725

Fig 1: Touchpad Control Unit Components Location - Model 205 With Code 448, Except Code 446

Courtesy of MERCEDES-BENZ USA

	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Remove/install
1	Perform initial startup of touchpad (A105)	When replacing touchpad (A105).
		Model 238 with code 448 (Touchpad) except code 446 (Touchpad only)	AD00.00-P-2000-06LWO
		Model 205, 213, 253 (except 253.992/993) with code 448 (Touchpad) except code 446 (Touchpad only)	AD00.00-P-2000-04B
2	Remove Audio/COMAND control panel (A40/9)	Model 205, 253 (except 253.992/993) with code 448 (Touchpad) except code 446 (Touchpad only)	AR54.21-P-0500LW
		Model 213, 238 with code 448 (Touchpad) except code 446 (Touchpad only)	AR54.21-P-0501LWE
3	Remove bolts (1)
4	Pull touchpad (A105) out of Audio/COMAND control panel (A40/9) in direction of arrow
5	Install in the reverse order