Drive my 2.3t since 80tkm with Hirschtuning (km-Stand: 230tkm). Recently there was a power drop. However, the machine continued to run calmly and evenly. One day later, after intensive acceleration, the car became very restless when taking the gas, the engine almost wanted to go off. After stopping I had to detect smoke clouds from the exhaust. Through this forum sensitized, I towed the car into the workshop. Diagnosis: Pressure hose dropped. The same thing happened with his A6 turbodiesel. The fitting of the hose cost him 40€ in the workshop. My invoice includes the following positions: -catalyst removed and installed and checked for permeability – turbocharger system tested – ignition system tested (individual part testing) – intake system tested – vacuum lines renewed – error memory read out and reset Total: 276€ + VAT. In all cases the full power is still not d a. According to my technical understanding some of these works run under ABM. My trust in this Wekstatt is gone. Am I right with this assessment?