S 55 AMG (220.174) V8-5.5L SC (113.991) (2004)
1.
Access fuse and relay box (arrow, Figure 1) in engine compartment.
2.
Replace relay module K40 (A, Figure 2).
3.
Assemble in reverse order.
4.
Proceed to SUBJECT I.
B.
MODEL 199 - REPLACE SECONDARY AIR INJECTION PUMP RELAY