2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 547

- N10/1 (Driver-side SAM control unit with fuse and relay module)

Fuses

- FuseF43-F67

Relays

- I =N10/1kI (Circuit 87 relay, engine)

- K =N10/1kK (Circuit 87 relay, chassis)

- L =N10/1kL (Starter relay)

- M =N10/1kM (SEQ [ASG] pump control relay)

- N =N10/1kN (Circuit 15 relay)

- O =N10/1kO (FAN relay module)

- P =N10/1kP (Circuit 15R relay)

- R =N10/1kR (Air pump or oil cooler fan relay)

3. Power supply

Voltage supply via component Z7/36 (Circuit 87 M2e connector sleeve)

Possible cause and remedy

- Check voltage supply according to wiring diagram.

4. Check component G3/5 (Left O2 sensor, after TWC [KAT]).

Warning!Communication with ECU required.

0556

G3/5 (Left O2 sensor, after TWC [KAT]) : Short circuit between signal line and line to sensor heater (P0156)

Possible cause:

- G3/5 (Left O2 sensor, after TWC [KAT])

Affected functions:

- Engine diagnosis

- Exhaust system

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Test 1: Check component G3/5 (Left O2 sensor, after TWC [KAT]).

1. Check component G3/5 (Left O2 sensor, after TWC [KAT]).

Warning!Communication with ECU required.

0559

G3/4 (Right O2 sensor, before TWC [KAT]) : Open circuit (P2626)