Genuine 1238000078 Vacuum Power Check Valve

Vacuum Power Check Valve for Mercedes-Benz

This Genuine vacuum power check valve helps maintain proper vacuum flow in the body vacuum power system. It is a direct-fit service part for select Mercedes-Benz diesel and V8 models, including 1977-1985 Mercedes-Benz 300D, 1980-1985 Mercedes-Benz 300TD, and 1982-1985 Mercedes-Benz 380SL. Part number 1238000078 is a practical choice when diagnosing vacuum-related drivability or control issues.

Key Features

• Genuine vacuum power check valve for body vacuum power system service
• Fits 1977-1985 Mercedes-Benz 300D, 1980-1985 Mercedes-Benz 300TD, and 1982-1985 Mercedes-Benz 380SL
• Supports one-way vacuum control in the vehicle vacuum circuit
• OE-style replacement identified by part number 1238000078
• Black / white application noted for select fitments

Detailed Description

Vacuum systems on classic Mercedes-Benz vehicles rely on stable one-way flow to operate related body and control functions. This Genuine vacuum power check valve is built for that role, helping preserve vacuum direction in the system and supporting consistent operation across the applicable chassis. If you are searching for a Mercedes-Benz 300D vacuum check valve, a Mercedes-Benz 300TD vacuum power check valve, or a Mercedes-Benz 380SL vacuum system replacement, part number 1238000078 matches the listed applications.

This part cross-references no additional part numbers in the provided data.

What It Helps Address

• Vacuum bleed-down after engine shutdown
• Irregular operation in vacuum-controlled body functions
• Loss of vacuum retention in the power system
• Hard-to-trace vacuum circuit performance issues

Installation Notes and Tips

Verify the existing valve orientation and hose routing before removal. Match the replacement to the original vacuum line layout and confirm the black / white application detail where noted. After installation, inspect the system for leaks and confirm that vacuum holds properly under operating conditions.

Quality Assurance

Genuine replacement part 1238000078 is specified for the listed Mercedes-Benz applications and should be matched to the vehicle’s original vacuum system configuration for proper service fitment.