Why does the Mercedes-Benz C-Class have a current sound?

1 Answers
DeNora
07/30/25 3:29am
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.
Was this review help?
7
5
Share
More Forum Discussions

What transmission does the Haval F5 use?

The Haval F5 is equipped with a 7DCT wet dual-clutch transmission, which is a high-end product independently developed and produced by Great Wall Motors. This same transmission is also used in models like the H6 and H7, and it has won the 'World's Top 10 Transmissions' award. About the Haval F5: 1. The Haval F5 adopts Haval's new design style, featuring a large-mouth grille with a dot-matrix design inside, paired with willow-leaf-shaped headlight clusters, creating a more sporty effect, making it appear younger than the H4. 2. In terms of the interior, the Haval F5 is not much different from the H4, basically retaining the H4's interior structure, unlike the F7 and H6, which underwent a redesign. However, the F5 has made more sporty changes in decorative details, such as replacing the H4's four-spoke steering wheel with a three-spoke one. 3. For the powertrain, the Haval F5 is equipped with a 1.5T engine and a 7-speed dual-clutch transmission. The engine delivers a maximum power of 124kW and a maximum torque of 285Nm, making it the highest among these models. Given Haval's heavier vehicle weight, this ensures sufficient power. Additionally, Haval's chassis tuning tends to be more stable, a characteristic common across its models. The handling tuning doesn't follow a sporty route either, appearing slightly more conservative compared to the CS55 and GS4.
8
4
Share

How to align the timing marks on the Jiangling Shunda timing belt?

Align the crankshaft mark to the 12 o'clock position and match it with the mark on the timing seat. There is a positioning hole on the camshaft, which can be fixed by screwing in an 8mm bolt. After installation, rotate the crankshaft two turns and check if the timing marks are correctly aligned.
7
4
Share

Is the Wuling Hongguang S3 front-wheel drive or rear-wheel drive?

Wuling Hongguang S3 is an engine front-mounted rear-wheel drive vehicle. Here is some extended information about the Wuling Hongguang S3: 1. The Wuling Hongguang S3 is equipped with two engines: a 1.5-liter naturally aspirated engine and a 1.5-liter turbocharged engine. 2. The engine features DVVT technology: the fuel supply method is multi-point electronic injection, and it uses an aluminum alloy cylinder head. The engine is paired with a 6-speed manual transmission. 3. All models of the Wuling Hongguang series are equipped with front-engine rear-wheel drive: the biggest advantage of rear-wheel drive is the direct power delivery and good traction, which is particularly evident when climbing slopes.
2
3
Share

How much engine oil does the BMW X1 require?

According to BMW's official engine oil filling specifications, all BMW X1 models require 5 liters of engine oil. Additional details about the BMW X1 are as follows: 1. The BMW X1 adopts the latest design language of the BMW X family, featuring a large, poised one-piece double kidney grille paired with sharp and dynamic front and rear bumpers. 2. The new LED headlights offer greater visual impact, complementing the 18/19-inch aluminum alloy wheels. 3. The BMW X1 is equipped with two engine options: a 1.5T and a 2.0T, balancing powerful performance with fuel efficiency. The 1.5T model delivers a maximum power of 103 kW and a maximum torque of 220 Nm, while the 2.0T model produces a maximum power of 141 kW and a maximum torque of 280 Nm. 4. The BMW X1 comes standard with LED headlights, front sport seats, an electronic gear shift lever, six-color ambient lighting, and a driver-side welcome logo.
15
3
Share

How to Reset the Lexus Fuel Injector Warning Light?

Shift the gear lever to the P position. Start the engine. Turn on the defroster switch, then press and release the brake pedal 4 times within 20 seconds. Turn off the defroster switch, then press and release the brake pedal 4 times within 20 seconds. Confirm that the warning light turns off.
11
0
Share

What to Do If You Turn the Steering Wheel Too Early When Backing into a Parking Spot on the Right Side?

At this point, quickly straighten the steering wheel completely, allowing the car body to back diagonally for a certain distance from the parking spot edge. When the car body has backed to the point where the door handle aligns with the right corner of the parking spot, turn the steering wheel all the way to the right again. Once the car body is parallel with the parking spot line, straighten the steering wheel.
8
4
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.