Good evening, maybe a professional engine technician can answer my question more precisely. I drive a Mercedes A200 Turbo 26000Km. Recently on the highway I accidentally switched off, namely from the 6th to the 5 gear, and that at a speed of about 130 – 150 km/h, I let the clutch come reasonably slowly, am only very scared, because the speed indicator quickly arrived at about 3800 rpm. I quickly returned to the clutch. With the last 25Km up to my destination I didn’t hear anything suspicious. Do I really worry about consequential damage. Now my question; Will the lifespan of the conrod bearings (general bearings) or engine technology be greatly shortened? Could something else (after another km) be noticeable or closed? I didn’t feel anything about the “motor brake”, I hope that no oil film crack was created somewhere in the engine when this rapid speed increase occurred. However, if I would step the clutch slowly, then switch from the 6th to the 5th, immediately the clutch would have let go too quickly, and the speed would jump abruptly from e.g. 1000 to 4000; which engine parts would then be the most stressed? What is worse for the engine; “Hard blows on the pistons (explosion) or the connecting bearing ..or the “shut operation” because the engine is not moving under load, the gearbox drives the engine, But if this speed increase is so healthy for the bearings & co….I doubt it. >Slowly < rising speed I would call healthy, but if you accidentally switched off and let the clutch go too fast, for example, the crankshaft gets the high speeds off the gearbox, clearly the engine slows down a little, but somewhere the wear or abrasion in the engine you never learn from.... Thanks already for your effort and I nformative answers, Best regards