1669065401 / A1669065401 Rear Parking Brake Actuator for MercedesBenz W166 X166 GL GLE GLS ML including ML 63 250 350 400 450 550, 2012 2018 Function and benefits Used to stabilize the vehicle, prevent sliding, and enable a smooth start when the vehicle is parked on a slope. Provides reliable rear parking brake operation for the listed MercedesBenz models and year range. Compatibility and fit Compatible with MercedesBenz models W166 and X166 series including GL, GLE, GLS, and ML variants. Fits ML 63, ML 250, ML 350, ML 400, ML 450, ML 550; applicable to vehicles manufactured from 2012 to 2018. Durability and build quality Crafted from durable materials designed to withstand the rigors of daily use. Built to deliver long parking brake life and reliable performance over time. Performance and reliability Rear Parking Brake Actuator supports dependable engagement and release, contributing to consistent braking system function. Use scenarios Scenario 1: Parking on a steep driveway or road grade where the parking brake must hold the vehicle securely and release smoothly when starting. Scenario 2: Replacing a worn or faulty parking brake actuator to restore safe and reliable parking brake function in the described MB models. Scenario 3: Routine maintenance or component replacement for a 2012 2018 MercedesBenz W166/X166 family vehicle to maintain proper parking brake operation and reliability.