Sunsong 3402030 Power Steering Pressure Line Hose Assembly

Mercedes-Benz Power Steering Pressure Hose

The Sunsong 3402030 power steering pressure line hose assembly is built for Mercedes-Benz 300D, 300SD, and 300TD applications with a direct-fit layout for the listed model years. It is engineered to handle demanding steering system pressure while maintaining reliable fluid transfer and consistent steering response.

• Fits 1977-1985 Mercedes-Benz 300D, N/A
• Fits 1978-1985 Mercedes-Benz 300SD, N/A
• Fits 1979-1985 Mercedes-Benz 300TD, N/A
• End 1 fitting: 14 mm female swivel
• End 2 fitting: 5/8 in male inverted flare
• 28.3 in (718 mm) hose length
• CSM hose material for fluid and heat resistance
• Part number: 3402030

Built For Pressure And Corrosion Resistance

This power steering pressure hose assembly is manufactured to exceed original equipment performance standards, with a 1,500 psi maximum working pressure, 8,700 psi burst pressure rating, and 1,600 lb tensile strength. The steel tubing is zinc electroplated to help resist corrosion from humidity, road salt, water, and grime, making it a practical replacement for aging Mercedes-Benz 300D, 300SD, and 300TD steering lines. Sunsong 3402030 is precision engineered for exact fitment and is cross-referenced to Monroe Shocks & Struts 172286 and 182286 for the same application.

Common Problems This Hose Can Address

• Power steering fluid leaks from a worn or cracked pressure line
• Hard steering caused by pressure loss in the hydraulic circuit
• Noise or inconsistent assist from a deteriorated hose assembly
• Corrosion-related failure on original steel tubing
• Fitment issues when replacing an aging Mercedes-Benz steering pressure hose

Installation Notes And Fitment Tips

Verify the end fittings, hose length, and routing before installation. This assembly does not include a bracket or power steering switch port, so confirm your vehicle’s original configuration matches the listed specifications. For Mercedes-Benz 300D, 300SD, and 300TD applications, inspect adjacent seals, clamps, and hard lines for wear before completing the repair.

Quality Assurance

Each Sunsong 3402030 hose is pressure tested before leaving the factory to help ensure proper operation and trouble-free installation. The design also incorporates the required wear components and protective features as specified for the application, supporting a restoration that matches original-condition routing and fitment.