Remove/Install Horn - AR54.35-S-1556EA

Model 447, 448 

With Code XM0 (Facelift) 

Shown on model 447.7 on right horn (1) 

Fig 1: Horn Components Location - Model 447 With Code XM0 (Shown On Model 447.7 On Right Horn (1))

Courtesy of MERCEDES-BENZ USA

Notice	General information on vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system as well as personal protective equipment	Model 447 with Motor 780	AH00.00-Z-0300-01A
Notice	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	Remove/install
1	Remove right or left front fender liner.	Model 447, 448 as of 17.11.20 The left horn (1) is no longer required.	AR88.10-S-1300E
2	Release and disconnect electrical connector (2).
3	Unclip electrical wiring harness from holder of left horn (1).	Model 447, 448 up to 16.11.20 If left horn (1) is removed. Clip remover	Fig 2
4	Unscrew screw (3) and remove left or right horn (1).
5	Install in the reverse order.
	Check
6	Perform function check of left or right horn (1).

Fig 2: Identifying Clip Remover (452 589 01 63 00)

Courtesy of MERCEDES-BENZ USA