Audi is perplexed

Hello, need urgent help, my Audi tt, 180 hp, jerks, especially at low rotational speeds, very extreme at full throttle, final speed it doesn’t bring any more, now it comes: Was at Audi, they did everything listed below and don’t know now, can someone help me?!! – LMM renews – spark plugs renewed – ignition coils renewed – turbocharger tested – magnetic switch valve renewed – gas pedal tested – throttle valve unit renewed – exhaust gas values tested Error memory out, no error Rejoice me about any help!!!!