jastreb

Sometimes (not all the time) when braking, the car's revs drop drastically and then rise sharply and the car shoots forward on its own, stalling.
Also, in some cases, even when driving in the city, it stalls (works unevenly). Or, after setting the autopilot on the highway, you feel a slight delay while driving.
There were cases when it went out while braking and so several times in a row.
The compass does not throw any errors.
The official MB service can't find anything (because apart from connecting the computer, they don't even try to do anything else and have no ideas).
Engine petrol, V8, 4.7, 2014.
If you have encountered something similar - help

jimyj

It sounds like your car is exhibiting erratic engine behavior, particularly noticeable during braking and occasionally while driving in the city or using autopilot on the highway. The symptoms—drastic drops and sharp rises in RPMs leading to stalling, along with intermittent engine performance issues—suggest potential issues with the throttle body, idle control system, or electronic throttle control module. These components regulate airflow and fuel delivery to the engine, and any malfunction can cause irregular engine responses such as surging or stalling. Given the complexity of modern engine systems, intermittent issues like these may not always trigger diagnostic trouble codes immediately, making them challenging to diagnose without a comprehensive scan. I recommend conducting a full system scan using a diagnostic tool capable of accessing all relevant control modules, including the engine control module (ECM) and transmission control module (TCM). This scan should reveal fault codes that will provide valuable clues to pinpoint the root cause of the problem. If you're inclined to diagnose and potentially resolve the issue yourself, consider using a full system scanner like the youcanic full system scanner, which is designed to perform in-depth diagnostics across all vehicle systems. Alternatively, consulting with a mechanic who has experience with Mercedes-Benz V8 engines and advanced diagnostic tools can expedite the troubleshooting process.