Mercedes-Benz W204 adopts new EZS with NEC processor marked IRLAND or HAVANNA (also named EIS-electronic ignition switch). Mercedes CAN filter will work with EZS types. For installation remove EZS from car.
Optional CAN FILTERs for Mercedes W204:
Step 1– prepare Mercedes CAN filter board
check – resistor 121 must be soldered and solder second configuration points like in pictures
Step 2– Remove EZS board from casing.
Carefully disconnect board from mechanic – look on picture.
Step 3– Remove from EZS board SMD part marked with red “X”.
With short, good isolated wire connect Mercedes CAN filter to EZS board according picture: 1-1 (C1H), 2-2(C1L), 3-3(C2H), 4-4(C2L), 5-5(GND), and 6-6 (+5V).
Step 4– After connection, insulate Mercedes CAN filter board with heat shrink or insulation tape. Put it carefully to EZS casing.