Mercedes-Benz S600 gearbox transmission issue with ETC faulty and sport gear not working on Mercedes-Benz S600

Some Mercedes-Benz S600 owners report experiencing gearbox transmission issues, particularly related to a faulty Electronic Transmission Control (ETC) and non-functional sport gear mode. These problems can manifest as difficulty in changing gears, erratic shifting, or the transmission getting stuck in one gear due to a malfunctioning ETC. Additionally, when the sport gear mode is not working, it may be attributed to electrical issues or mechanical failures, which can hinder the vehicle's performance. Owners are advised to conduct a diagnostic check using an OBD-II scanner to identify fault codes related to the transmission system and to inspect the brake switch, as a malfunctioning brake switch can disrupt gear signaling. Furthermore, ensuring adequate transmission fluid levels is crucial, as low fluid can negatively affect performance. If these issues persist, consulting a professional mechanic or authorized Mercedes-Benz service center for a thorough inspection is recommended to restore optimal functionality.