Replace battery for transmitter key - AP80.20-P-8080MCC

MODEL 451.3/4 

Fig 1: Identifying Transmitter Key, Upper Transmitter Key Housing And Battery

Courtesy of MERCEDES-BENZ USA

	Remove
1	Insert suitable coin in the notch (arrow) by light rotary movement press the upper transmitter key housing (2) off the lower transmitter key of the transmitter key (1)
2	Remove battery (3) from the lower transmitter key housing of the transmitter key (1)
	Install
3	Insert battery (3) in the lower transmitter key housing of the transmitter key (1)	When inserting the new battery (3), make sure that the polarity is correct. Electrical components of the transmitter key (1) can otherwise be damaged.
4	Position upper transmitter housing (2) on the lower transmitter key housing of the transmitter key (1) and clip in
5	Carry out function test of transmitter key (1)