Mercedes-Benz E320 power loss and shaking at high speeds with check engine light on on Mercedes-Benz E320

Some Mercedes-Benz E320 owners report experiencing power loss and shaking at high speeds, accompanied by the check engine light being illuminated. These issues may stem from engine misfires, often due to faulty spark plugs or ignition coils. Additionally, owners may notice a loss of engine power, which can manifest as the engine revving without changing gears, possibly indicating that the vehicle is in limp home mode. The check engine light can signal various problems, including issues with the engine or fuel system, while engine vibration may arise from multiple factors that need prompt attention for optimal performance. Common causes for the check engine light in the E320 include emissions system issues and oxygen sensor problems. It is advisable for owners to have their vehicles inspected by a qualified mechanic to diagnose the root cause of these symptoms, as neglecting them could lead to further damage and more costly repairs in the future.