OMNIVALEA AC Panel Slider Button Set Mercedes W124 W201 190 E-Class A1248300754

WHY THIS PART FAILS AND HOW THIS SET SOLVES IT

The ventilation slider on the W124 and W201 dashboard is operated constantly across decades of service, and the original plastic becomes brittle with age and cabin heat — the button cap cracks or falls off, and the ribbed rack underneath wears until the slider no longer holds its position. The vent unit and control mechanism behind the panel almost always remain serviceable. This two-piece POM set replaces exactly the failed components, restoring positive slider action without sourcing an increasingly rare complete vent unit.

WHAT TO CHECK BEFORE PURCHASE

These classic Mercedes dashboards use several slider variants across production years, so compare the shape of the button cap and the tooth pattern of the ribbed rack with your original parts and the product photos before ordering. Note that OE A1248300754 refers to the complete center vent unit in the genuine catalogue — this listing is the two-piece slider button repair set for that unit, not the complete vent assembly.

PROFESSIONAL INSTALLATION NOTES

Work with care on aged dashboard plastics, which become brittle over time — use a plastic trim tool rather than metal levers around the panel. Remove the remains of the old button and rack, clean the slider track, and seat the new rack and button cap onto the mechanism with even hand pressure until they engage fully. Move the slider through its complete travel several times to confirm smooth, positive operation before finishing. A tiny amount of silicone-safe grease on the track improves feel and reduces future wear.