Mercedes W177 Seat Buckle Belt Rear Left N/S Seatbelt Lock A1778602100

Mercedes W177 Seat Belt Buckle Left Rear Left Rear is an original part from the seat belts and parts category, designed for installation on the rear left side of the vehicle. It ensures proper anchoring of the seat belt, which translates to stable passenger restraint and improved passive safety in the cabin.

Specifications and technical data

• SKU: A1778602100
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1778602100
• Substitutable numbers: A1778602100, A 177 860 21 00
• Location on the vehicle: Rear, Left
• Category: Seat Belts & Parts

Vehicle Purpose and Placement

The presented buckle is dedicated to the Mercedes W177 body style and operates in the rear – left side zone. It is responsible for precise connection with the seat belt webbing, guaranteeing correct fastening and secure retention of the buckle during driving and in emergency situations.

Placement on the rear seat on the driver's side allows for:

• stable seat belt mounting for the rear left passenger,
• correct cooperation with factory anchor points in the W177 body,
• maintaining the original belt routing geometry, in line with the manufacturer's design.

Technical and Functional Characteristics

The seat belt buckle belongs to the seat belts and parts group, meaning it is a component of the passive safety system. The construction has been prepared for factory Mercedes mountings, ensuring that:

• it fits factory brackets and mounting bolts in the rear of the body,
• it ensures compatibility with the original belt webbing on the left side of the rear seat,
• it maintains the correct buckle position, facilitating quick fastening and unfastening of the belt.

As an OEM Mercedes part, the buckle is designed to maintain appropriate durability, resistance to dynamic loads, and the repeatability of the latch mechanism's operation.

Benefits of Using an Original Seat Belt Buckle

Choosing an original buckle for the Mercedes W177 for the rear left side is a solution that maintains the integrity of the entire safety system. Key advantages include:

• factory fit for the W177 body – no need for modifications or adapter brackets,
• preservation of designed safety parameters for the rear left seating position,
• seamless integration with other seat belt components in the vehicle,
• aesthetic integration into the interior, consistent with the original manufacturer's specifications.

Installation and Practical Application

The buckle is designed for installation at the factory mounting point on the rear left side of the vehicle. When replacing, it is recommended to:

• check the condition of mountings and threads in the body,
• use appropriate tightening torques in accordance with service documentation,
• verify the correct operation of the latch mechanism after installation by repeatedly fastening and unfastening the belt.

This approach helps maintain the full functionality of the seat belt system and reduces the risk of malfunction during daily operation.

Related Products and Technical Knowledge

If you are looking for other components from the seat belts and parts category dedicated to this brand, check out our offer for Mercedes seat belts and parts, where you will find a wide selection of safety system components for various models.

When working with safety components, it is also important to ensure proper visibility on the road. For this reason, we recommend the guide article See More and Better – A Complete Guide to Selecting and Replacing Used LED and Xenon Headlights, which helps in consciously selecting lighting and ballasts for vehicles, complementing a comprehensive approach to driving safety.