Mercedes-Benz W176 (A-Class) Driver’s Side Window Switch | Genuine OEM Control Module

Description

If your driver’s window switch is unresponsive, “sticky,” or if it only works intermittently, the internal circuit board or the mechanical contact buttons have likely worn out. In the W176, the driver’s side master switch controls not only the driver’s window but also the passenger windows and the electronic side mirrors.

Our workshop-vetted original master switch assemblies are the professional solution to restore full functionality. Unlike cheap aftermarket replacements that often suffer from “cheap” plastic feel and short-lived electronics, these genuine units are engineered for high-cycle reliability and provide the factory-original tactile “click” you expect.

• Full Integration: Controls all four windows and mirror adjustments as per the factory configuration.

• Tactile Feedback: Genuine buttons that provide the precise, satisfying response consistent with the Mercedes-Benz interior quality.

• Condition: Premium workshop-vetted original component; verified for responsive button actuation, zero internal circuit board corrosion, and clean connector pins.

Common Symptoms of Switch Failure:

• Intermittent Operation: The window works sometimes, but requires “wiggling” or repeated presses to activate.

• One-Touch Failure: The auto-up or auto-down feature fails to trigger.

• Mirror Control Failure: The joy-stick control for the side mirrors becomes unresponsive or drifts.

• Backlight Failure: The internal illumination of the switch symbols is dead, or the switch itself feels “loose” and unresponsive.

Workshop Pro-Tip: Before replacing the master switch, check the door wiring loom that runs through the rubber boot in the door jamb. The W176 can develop “broken wires” inside that boot due to repeated opening/closing of the door, which mimics a dead switch. If the wiring is sound, replacing the switch is usually “plug-and-play,” but in some configurations, you may need a quick diagnostic reset to re-initialize the “Auto-up” function for the windows after the new unit is connected.

Key Features:

• Perfect Fitment: Direct replacement for the W176 A-Class driver’s door panel.

• Electronic Compatibility: Matches your vehicle’s specific comfort-control module version.

• Quality Assured: Tested for electronic switch continuity and button-spring longevity.