EGR valve w203 c180 2003 kompressor m271

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Hello everyone, I hope you are all well. I have a 2003 Mercedes W203 C180 AT M271 and I am having problems with the air system. The car has just driven 100,000 km, so I took the opportunity to change the two oxygen sensors. I had already changed the 4 spark plugs two weeks ago, changed the mass airflow sensor, changed the crankcase breather hose, changed the ignition coil, cleaned the throttle, but the car still has poor acceleration and is using a lot of fuel. Today I cleaned the EGR valve and tested it. The membrane is opening well, but I noticed that there is no suction pressure in the two air tubes, which led me to suspect that the part I am sending you attached is not working. I do not know the name of this part and would like to ask for help and tips with the entire system. And if you can give me a tip on how to repair it or buy a new one, I would thank you in advance.