Hello, after viewing the articles I have unfortunately found nothing- annoying high frequency squeaking from the engine compartment – since about 50000km!!!!. Description: Engine is at operating temperature (not only the 90° on the display, but also the engine oil). As soon as I give back gas in the sliding mode (downhill without power), a very annoying squeaking occurs (starts at about 1000 rpm and ends at about 2500 rpm). Under load this then disappears again comparable to a slide The workshop said that the belt with all pulleys had to be replaced – of course let it do and- problem still there!!! About 10000km later the master came up, the turbo has changed a Macke- and now with 800€ expensive certainty- problem is still there!!!! What could that be????? Again summarized: – occurs only with really warm engine – occurs after sliding operation – when driving under load this does not occur – Turbo / pulleys / pulleys lt – already since about 50Tkm Grateful for every hint!!!!