ZAPOSTS Power Window Master Switch for Mercedes-Benz Driver Side — Replaces 1669054400, Direct-Fit OE Connector

ZAPOSTS Power Window Master Switch is a direct-fit driver-side control module designed to replace worn or failed window switch assemblies on many Mercedes-Benz models, restoring reliable window and mirror control.

This replacement master switch is manufactured to match the form and function of the original driver door control for a broad range of Mercedes-Benz A-, B-, CLA-, G-, GLA-, GLE-, GL- and ML/GLC-series vehicles. It accepts the same electrical connectors and mounting points as OEM units identified by part numbers such as 1669054400 and A1669054400, making it a straightforward swap when your factory switch stops responding, has intermittent contacts, or the buttons feel loose.

Which Mercedes-Benz models will this switch fit?

This ZAPOSTS unit covers many model years and trim levels across several Mercedes lineups. Before purchase, check the adaptation list and confirm your vehicle year and model match one of the supported entries to avoid fitment issues. The listing includes common models from A200/A250 to G-series and GLE/GL/ML families across 2012–2019 model years.

• Compatible lines include A, B, CLA, G, GLA, GLE, GL and ML series.
• Double-check model year ranges listed in the description for your exact vehicle.
• Verify compatibility using the replacement part numbers: 1669054400, A1669054400, 29290550009107, etc.

How does installation work and what precautions should I take?

Installation is intended as a direct replacement — the switch uses the same mounting and electrical connections as the original. However, basic safety steps help prevent damage: disconnect the vehicle battery or switch the ignition off, align the connector pins carefully, and ensure the plug seats fully to avoid poor contact or pin deformation.

• Turn off vehicle power before beginning work to avoid short circuits.
• Insert the connector parallel to the socket and avoid forcing it at an angle.
• Confirm the plug is fully seated and secure before testing window functions.
• Contact the seller via the order page if you need installation guidance.

What exact part numbers does this replace and why is that important?

Matching replacement numbers is the most reliable way to confirm fitment when swapping switches. This ZAPOSTS master switch is listed to replace several OEM references, so if your damaged unit carries one of those numbers, the replacement should be electrically and physically compatible.

• Replaces: 1669054400, A1669054400, 16690544009107, A16690544009107.
• Also cross-referenced with: 29290550009107 and A29290550009107.
• Compare your current switch’s part number and the wiring connector to confirm compatibility.

What functions and features can I expect from this master switch?

The module restores central driver-side control for power windows and related door functions, offering a factory-like feel and button response. It’s supplied as a complete driver-side assembly to replace the original switch cluster without special tools, helping you regain full window and (where applicable) mirror control.

• Direct-replacement design for an OEM-style fit and operation.
• Simple install—no advanced tools required beyond basic trim removal.
• Built to work with the vehicle’s existing wiring harness and connectors.

Who is this for: This ZAPOSTS Power Window Master Switch is aimed at Mercedes-Benz owners, DIY mechanics, and professional technicians who need a reliable, cost-effective replacement for a failing driver-side switch. If your vehicle is listed in the compatibility section and your OEM part number matches one of the cross-referenced references, this unit offers a practical solution to restore control of windows and door functions without buying a dealer-priced part.

Note: Always confirm fitment against your car’s part number and review the included images. For questions about compatibility or installation, contact us through the order page or Amazon customer support.