220 589 00 99 20 Test cable - WS54.00-P-0050-14B

FG 20/25/42/43/54/Set B 

MODEL all 

Use: 

Test wire 2 m with protection against accidental contact

(Kit = 1 black and 1 red wire).

Fig 1: Identifying Adapter Line (220 589 00 99 20)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.