I can read out the fault memory at Audi. Deposited was a short circuit itslearning in the hydraulic

I know that this phenomenon was treated as described in many threats, but I have found nothing specifically for my case Perhaps someone knows well and can give me a tip, So slowly I do not go on.
So the error occurred recently on the highway. It began to light up the ESP and ABS light and the Vorglühwendel began to flash. The engine speed increased to 1100 rpm and the accelerator pedal was not functional. Diagnosis based on the n Audi Workshop: EGR system is leaking. Did it have to replace a new valve and both lines. Then he ran as before. Ca 2000km later, the same error was established. When you check a screw in the vacuum hose from the EGR valve I noticed. Found this very strange. Did this then removed, and again the engine was running as usual.
Well again 2000km later is good again at the roadside. This time again the lights ESP Vorglühwendel flashes. The speed increases to 1100, but decreases when pressing the brake pedal. By the brake pedal, the speed is constantly lowered. The accelerator pedal is again no function.
B7 (8E)
NEN have B7 but all the same Syptome had only yesterday've read fault memory and then replaced the brake pedal switch and since then everything works again. The switch cost with me in Ö 16.
I can read out the fault memory at Audi. Deposited was a short circuit itslearning in the hydraulic mount, and a sporadic error on the gas pedal encoder or so. The brake pressure transducer would be fine according to the mechanic at Audi. Otherwise, nothing is stored.
The error occurs completely spontaneously. It reveals itslearning no system. After I let him have the last time got one night, he is now running normally again. Without something to repair.
OK thanks. Did I even let go, is currently itslearning running normally. Let's see how long.
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