Vehicles equipped with a 7-speed automatic transmission may develop a rough shifting condition, most commonly going up from first to second gear and going down from third to second or second to first gear. Our technicians tell us this is due to an internal component failure. Mercedes has released updated parts; the transmission will need to be removed and disassembled to complete the necessary repairs.

Some Audi A6 Quattro owners report experiencing issues with their gas and speedometer gauges not functioning, often attributed to a faulty sensor. Common causes include problems with the vehicle speed sensor (VSS), a malfunctioning speedometer, or electrical issues. A faulty speed sensor can lead to inaccurate speed readings, affecting fuel flow and ignition timing, and may result in erratic behavior or a complete stoppage of the speedometer. Additionally, issues with the sending unit, bad wiring in the gas indicator circuit, or problems in the speedometer circuit can impact the fuel gauge's functionality. In some instances, a malfunctioning speed sensor may even trigger the ABS light and cause the speedometer to stop working altogether. It is advisable for owners experiencing these issues to have the sensor checked and replaced if necessary to restore proper functionality.