Contents: Air purifier and air filter ↡ Assembling the air intake with the…↡ Intake manifold ↡ Electronic throttle actuator ↡
Air purifier and air filter
Removing the power unit cover with built-in air cleaner |
Air Purifier Filter Element Installation Details |
1. Pull up and remove the power unit cover with built-in air cleaner (1).
2. Remove the filter element from under the cover and install a replacement one in its place.
3. Replace the cover (1).
Assembling the air intake with the mass air flow (MAF) sensor
Air Intake Assembly Installation Details with MAF Sensor
1 - Power unit cover with built-in air cleaner
2 — MAF sensor wiring connector
3 — Crankcase ventilation line
4 — Air intake
B2/5 — MAF sensor
1. Remove the power unit cover with built-in air cleaner (1).
2. Disconnect the electrical wiring (2) from the MAF sensor (B2/5).
3. Disconnect the crankcase ventilation line (3).
4. Release the crankcase ventilation line to the right of the MAF sensor (B2/5).
5. Using a screwdriver, release the MAF sensor mounting clip (B2/5).
6. Press down the lock on the electronic throttle actuator and remove the air intake (4) together with the MAF sensor (B2/5).
7. Disconnect the sensor assembly (B2/5) from the air intake (4).
8. Installation is carried out in reverse order.
Intake manifold
Intake manifold installation details
6 - Combination valve; 19 - Inlet manifold; 19/1 - Bolts; 19/3 - Sealing gaskets; 89 - EGR valve; 89/2 - EGR Line; Arrow - Hole for combination valve
Intake manifold connection diagram
1 - Secondary vacuum; 2 - Vacuum control valve unit; 3 - Air injector combination valve; 4 - Inlet manifold; 5 - Check valve; 6 - Control flap of the changeover valve; B2/5 - MAF sensor; M16/1 - Electronic throttle actuator; M33 - Electric Air Pump; Y27 - EGR switch valve; Y32 - Air pump switch valve
1. Remove the air intake assembly with the MAF sensor (see above).
2. Remove the fuel distribution line with injectors (see Section Removal and installation of fuel distribution line and injectors).
3. Disconnect the relevant electrical wiring.
4. Loosen the union nut securing the ventilation line (89/2) to the EGR valve (89) - to prevent the fitting from turning, hold it with a second wrench.
5. Unscrew the mounting bolts (19/1) and remove the combination valve (6).
6. Remove the intake manifold assembly (19) - immediately plug the engine intake ports with a lint-free cloth.
7. Remove the sealing gaskets (19/3) - the gaskets must be replaced without fail.
8. Installation is carried out in the reverse order. New gaskets are first secured with studs (make sure the gaskets are positioned correctly), which are then turned out immediately before installing the pipeline.
Electronic throttle actuator
Electronic Throttle Actuator Installation Details
1/2 - Crankcase ventilation line; 8/1 - Bolts; 8/2 - Sealing ring; 19 - Inlet manifold; M16/6 - Electronic throttle actuator; Arrow - Connector
1. Remove the power unit cover with the air cleaner built into it (see above).
2. Remove the air intake assembly with the MAF sensor (see above).
3. Disconnect the crankcase ventilation line (1/2) from the intake manifold (19).
4. Disconnect the electrical wiring (arrow).
5. Unscrew the mounting bolts (8/1) and remove the throttle actuator (M16/1), - prepare a replacement sealing ring (8/2).
6. Installation is carried out in reverse order.
Resonator chamber with water collector
Installation details of the resonator chamber of the intake air tract and the water collector (all models) (1 of 2)
1 - Bolts; 2 - Fastening clamp; 3 - Drainage hose; 9 - Resonator chamber with water collector
(Material borrowed from an online resource Mercedesman.ru)
Installation details of the resonator chamber of the intake air tract and the water collector (all models) (2 of 2)
4 - Screws; 5 - Locker; 6 - Heat shield; 7 - Nut; 8 - Fastening clamp; 10 - Bolt; 11 - Sealing gasket
1. Open the hood.
2. Remove the three mounting bolts (1).
3. Loosen the fastening clamp (2) and remove the drain hose (3), - to ensure access, remove the wheel arch protection liner (5) (see Chapter Body).
4. Loosen the nut (7) and remove the clamp (8).
5. Remove the resonator chamber assembly with the water collector (9), - make sure that the drain hose is turned upwards.
6. Check the condition of the sealing gasket (11) and replace it if necessary.
7. Installation is carried out in the reverse order. Before screwing in, the bolt (10) should be lightly lubricated - make sure that the bolt is seated correctly in the guide.