2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 923

- 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 Y22/9 (Intake manifold tumble flap switchover valve).

Test 4.1: Test actuation of component Y22/9 (Intake manifold tumble flap switchover valve).

Test 4.2: Test current consumption of component Y22/9 (Intake manifold tumble flap switchover valve).

4.1. Test actuation of component Y22/9 (Intake manifold tumble flap switchover valve).

Test prerequisite

- The vacuum system is leaktight.

Test sequence

- Operate engine at idling speed.

- Actuate component Y22/9 (Intake manifold tumble flap switchover valve).(Actuate with key F2.)

Specified value

- Testing The rod of the vacuum unit can be seen to operate.The linkage of the swirl flap can be seen to move.(See arrow)