Remove/install the tumble flap and resonance flap switchover valve at the intake manifold - AR09.20-P-1990CV

ENGINES 272 (except 272.982) in MODEL 204 

ENGINES 272, 273 (except 272.982/984) in MODEL 207 

Fig 1: Identifying Tumble Flap And Resonance Flap Switchover Valve Remove/Install Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Remove resonance intake manifold		AR09.20-P-1961CV
2	Detach pneumatic line (1 or 2) from switchover valve (Y22/6 or Y22/9)	Check pneumatic line (1 or 2) for damage and replace if necessary.
3	Remove lock washer (3 or 4)	Replace lock washer (3 or 4).
4	Disconnect electrical connector (X205) and remove switchover valve (Y22/6 or Y22/9) from resonance intake manifold
5	Install in the reverse order