Now it’s my turn…

Hello together, yesterday I got the certainty (at 8 years and 220 tkm): * The STG of both loaders are defective (report overpressure every now and then with the result of the engine emergency run, although there is no overpressure) * Both AGR valves defective * middle bearings of the cardan shaft knocked out * metal ring of the climate compressor beats (I knew already) For the first three points I was estimated 7,000 EUR. Unfortunately I could not find any more about the search, therefore my question: What should be done with the open heart then everything prophylactically? Thank you in advance and best regards, Alexander