Why does the Mercedes-Benz C-Class have a current sound?
1 Answers
Mercedes-Benz C-Class may produce a current sound when the HOLD function is activated, and there may also be a current sound at the wireless charging area. HOLD function activation: This is due to an issue with the ESP hydraulic unit, where the sound is generated by the solenoid valve operating under oil pressure. The solution is to replace the brake fluid or the ABS pump. If replacing the brake fluid, set the filling pressure of the brake fluid filling machine to 1.2bar and bleed the brake system in the order of right rear, left rear, right front, and left front. Wireless charging area: The sound comes from the fan beneath the charging area, which operates when the temperature exceeds 30 degrees. This is unrelated to the interior temperature of the car but is influenced by the temperature of other components near the exhaust pipe underneath. The fan starts when the temperature rises.