W116 and W123 Broken Down Front Seat Swap

Jan 28, 2020


Welcome to Grafco Electric, your reliable source for automotive electrical solutions. In this guide, we will discuss the process of performing a broken down front seat swap between W116 and W123 models, providing you with the knowledge and instructions needed to successfully complete this task.

Understanding the Need for a Seat Swap

Over time, front seats in vintage cars like the W116 and W123 models can suffer from wear and tear, compromising their functionality and aesthetic appeal. In such cases, a seat swap becomes an ideal solution to restore comfort and enhance the overall look of your vehicle's interior.

Preparing for the Seat Swap

Before you begin with the seat swap, it is essential to gather all the necessary tools and materials. This includes a set of wrenches, socket set, screwdriver, and a clean working area. Additionally, obtain the compatible replacement seats for your specific models.

Ensure that you have ample space to maneuver around the vehicle and take necessary safety precautions, such as disconnecting the car battery and wearing protective gear.

Step-by-Step Seat Swap Process

Step 1: Remove the Old Seats

The first step is to remove the existing front seats from your W116 and W123 models. Start by locating the seat bolts and using the appropriate tools to loosen and remove them carefully. Keep track of the bolts and other components to ensure easy reassembly later.

Step 2: Disconnect Electrical Connections

As these models come with electrical seat adjustments, it is crucial to disconnect any electrical connections prior to completely removing the seats. Safely separate the wiring harnesses, taking note of their location and orientation for later reconnection.

Step 3: Position the Replacement Seats

With the old seats removed, carefully position the new seats in place. Ensure a proper fit and alignment, making any necessary adjustments to ensure a secure installation. Take note of any brackets or adapters required for the specific swap.

Step 4: Reconnect Electrical Connections

Now that the replacement seats are in position, reconnect the electrical connections. Match the connectors to their respective counterparts, ensuring a snug and secure fit. Double-check all connections to prevent any electrical issues in the future.

Step 5: Secure the Replacement Seats

Once the electrical connections are in place, secure the new seats using the original bolts or any additional hardware provided with the replacement seats. Ensure that they are tightened securely, but be cautious not to overtighten and damage the seats or floorboards.

Step 6: Test and Adjust

Before considering the seat swap process complete, it is essential to test the functionality of the new seats. Adjust the seats to various positions, ensuring all adjustments work smoothly and correctly. Make any necessary adjustments for comfort and optimal positioning.


Congratulations! You have successfully performed a broken down front seat swap between W116 and W123 models. With Grafco Electric's comprehensive guide, you have gained the knowledge and confidence to enhance your vehicle's interior with upgraded seats. Enjoy the improved comfort and aesthetics!

Contact Grafco Electric Today

If you require any further assistance with automotive electrical solutions or have any questions regarding the seat swap process, don't hesitate to reach out to Grafco Electric. Our team of experts is always ready to provide the support you need. Contact us today to learn more!

Khajohn Wimolcharoensuk
Thanks for the detailed instructions! Finally, I can fix my broken front seat without any hassle. 💪👍
Nov 8, 2023
Tabrina Gates
Great guide for swapping broken front seats between W116 and W123 models! 💪👌 Thanks for sharing the step-by-step instructions!
Oct 7, 2023