Relay assignment of fuse and relay box in left side of engine compartment (204.0/2 as of 2009; 204.3, 204.9) - GF54.15-P-1257-03CE

MODEL 204.0/2 as of model year 2009 MODEL 204.3 MODEL 204.9 

Fig 1: Identifying Fuse And Relay Box In Left Side Of Engine Compartment Relay Assignment

Courtesy of MERCEDES-BENZ USA

Slot	Designation
J	Circuit 15 relay (N10/1kJ)
K	Terminal 15R relay (N10/1kK)
LL	Backup relay (N10/1kL)
M	Circuit 50 starter relay (N10/1kM)
O	Engine circuit 87 relay (N10/1kN)
O	Fanfare horn relay (N10/1kO)
P	Valid for engine 156, 272, 276:  Secondary air injection relay (N10/1kP)
Q	Backup relay (N10/1kQ)
R	Chassis circuit 87 relay (N10/1kR)