Remove/install button unit on multifunction steering wheel - AR54.25-P-2840V

MODEL 171.4 

Fig 1: Identifying Button Unit On Multifunction Steering Wheel Components

Courtesy of MERCEDES-BENZ USA

	Removal/installation
1	Remove driver airbag unit (3)		AR91.60-P-0660V
2	Remove bolts (1)
3	Unplug electrical connectors (2) and remove left multifunction steering wheel button group (S110) or right multifunction steering wheel button group (S111) from driver airbag unit (3).
4	Install in the reverse order
5	Perform function check