On 320d diesel engines, the air filter is located directly on the engine and is integrated into the cylinder head cover.
Withdrawal
1. Cars with tempostat: Remove the mounting bolts and remove the tempostat motor from the holder (arrows in the illustration). Move the motor with the wires attached to the side.
2. Disconnect the suction pipe from the front side of the air filter.
3. Remove both brackets -2- at the air mass meter with a screwdriver. The adjusters on the plug -3- and clamp -1- must not be loosened.
4. Turn out the screw -1- and take out a box of the air filter upwards. Note: At point -2- there is a rubber support under the air filter. The illustration shows the air filter without filter element and top.
Installation
5. Install the air filter housing onto the lower rubber support. At the same time, connect the suction pipe to the front side of the air filter.
6. Fix the screw -1-.
7. Install the mass meter with O-ring and secure with brackets.
8. Cars with tempostat: Attach the speed control motor to the holder.