Engine Stop Start Cut Off Switch Plug for Mercedes A Class W177 2019-2024

Eliminate repetitive auto-stop sequences in your Mercedes-Benz A-Class W177 (2019–2024) with this direct-wire disable adapter. Designed specifically for models equipped with a factory “A off” dash button, this plug-and-play harness intercepts the communication line to keep the automatic start-stop system inactive from ignition until park. The internal module defaults to disabled mode after startup, and an illuminated red indicator confirms the feature remains suppressed. Pressing the original button momentarily restores normal function whenever driving conditions demand full system behavior.

Benefits & Tips

Constant micro-starting wears starter gears and alternator bearings while rapidly draining battery voltage during stop-and-go traffic. This adaptor removes manual toggling, letting the vehicle run quietly until you release the brake or shift into park.

• Fit the harness during routine service intervals rather than waiting for battery drop-off during winter months.
• Initialize the setting by starting the engine with the brake pedal depressed, waiting approximately four seconds, then releasing the pedal without touching the switch until the LED turns steady red.
• Rotate the supplied trim tool slowly along seam lines to pop the fascia panel loose without marking painted surfaces.

Product Specifications

• Vehicle Platform: Mercedes-Benz A-Class W177 (2019 to 2024)
• Connection Standard: Factory socket to OEM switch relay
• Housing Composition: Impact-resistant ABS
• Electrical Rating: 12V DC passenger vehicle compatible
• Net Mass: Approximately 50 g

Package Includes:

• 1× Engine Stop Start Cut Off Wiring Harness
• 1× Center Console Removal Tool

Warnings & Reminders

This modification only operates if your dashboard contains a physical “A off” activation button. Vehicles without that switch cannot accept the signal path. Always disconnect the negative battery terminal before probing center-console connectors to prevent ECU voltage spikes. Handle rigid clips firmly but evenly to avoid splitting aged fasteners.

All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.

Precise-fit connectors and verified wiring diagrams have kept motorists trusting intercyprus.com since 2002 — dependable upgrades shipped straight to your garage.