000 820 77 03 - Mercedes Benz Fuel Filler Door Lock Actuator
000 820 77 03 - Mercedes Benz Fuel Filler Door Lock Actuator - Image 2
000 820 77 03 - Mercedes Benz Fuel Filler Door Lock Actuator - Image 3
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000 820 77 03 – Mercedes Benz Fuel Filler Door Lock Actuator

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Description

000 820 77 03 – Mercedes Benz Fuel Filler Door Lock Actuator.
This electromechanical actuator is a critical component of the vehicle’s central locking system, specifically designed to secure the fuel filler flap. When the vehicle is locked via the key fob or internal switch, the actuator receives a 12V electrical signal that drives a small internal motor to extend a locking pin into the fuel door hinge or latch assembly, preventing unauthorized access to the fuel tank. Conversely, it retracts the pin when the vehicle is unlocked. Failure of this component is common and typically manifests as a fuel door that will not open even when the car is unlocked, or a door that remains unsecured when the vehicle is locked.
Compatibility:
This part is used extensively across the Mercedes-Benz lineup, primarily for the following models:

  • A-Class (W176, 2013-2018),
  • B-Class (W246, 2012-2019),
  • C-Class (W204/W205 Sedan and Wagon, 2008-2021),
  • E-Class (W212/W213 Sedan and Wagon, 2010-2023),
  • CLS-Class (W218/C257, 2012-2023),
  • S-Class (W222, 2014-2020),
  • GLA-Class (X156, 2015-2020),
  • GLC-Class (X253, 2016-2022),
  • GLE-Class (W166/C292, 2015-2019),
  • GL/GLS-Class (X166, 2013-2019),
  • SL-Class (R231, 2012-2020),
  • SLK/SLC (R172, 2011-2020).
    Note: This actuator typically fits Sedan and Wagon (T-Model) body styles; Coupe and Convertible variants often utilize a different part number.

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