This OEM Mercedes-Benz wiring harness is designed for the W140 S320 platform and supports electrical connections for the engine, chassis, and body systems. Wiring harnesses play a critical role in vehicle electrical systems by distributing power and signals between components such as the engine control unit, sensors, lighting systems, and interior electronics.
Mercedes-Benz engineered the W140 S-Class with an advanced electrical system for its time. The wiring harness integrates multiple electrical circuits into a structured cable assembly that ensures consistent power delivery and signal communication across the vehicle. By organizing numerous electrical connections into a single routed harness, the system maintains reliability and simplifies installation within the vehicle’s chassis.
This harness supports electrical connectivity for engine components, chassis electronics, and body systems used in the W140 S320 equipped with the M104 3.2-liter inline-six engine.
This listing is for a used OEM wiring harness, making it suitable for electrical repairs, restoration projects, or replacement of damaged wiring assemblies in compatible Mercedes-Benz vehicles.
Compatibility / Fitment
This wiring harness is designed for Mercedes-Benz W140 S320 models equipped with the M104 3.2L inline-six engine.
The W140 platform uses a complex electrical network connecting engine management systems, chassis electronics, and interior systems. Harness compatibility can vary depending on model year and equipment configuration.
Before installation, buyers should verify compatibility with their vehicle’s electrical system and confirm the wiring layout matches their existing harness configuration.
Features & Benefits
• OEM Mercedes-Benz wiring harness assembly
• Designed for W140 S-Class electrical systems
• Supports engine, chassis, and body electrical connections
• Factory connectors for proper electrical integration
• Organized cable routing for easier installation
• Suitable for electrical repairs or restoration projects
Using original equipment wiring harnesses helps maintain correct electrical communication between vehicle systems and ensures compatibility with factory connectors and modules.
Condition Details
This wiring harness is used and has previously been installed in a vehicle.
Typical characteristics of used wiring assemblies may include:
• Minor wear on protective wire insulation
• Cosmetic marks from previous installation
• Normal signs of use consistent with an OEM harness
All connectors, wiring branches, and mounting points should be inspected prior to installation to ensure proper function and compatibility with the intended vehicle.
Buyers are encouraged to review product photos and confirm part compatibility before purchase.
Joseph Allen (verified owner) –
Very good product that works perfectly.
Adam Mitchell (verified owner) –
Very well built and performs perfectly.
Jordan Stewart (verified owner) –
Quality product that performs consistently well.
Tyler Collins (verified owner) –
Excellent performance and very easy to use.
Caleb Morgan (verified owner) –
The product arrived quickly and works great.
Elijah Bell (verified owner) –
The build quality is fantastic.