Fuel accumulator – Mercedes Jetronic injection system W123 W116 R107 W460

Description

Fuel accumulator for Mercedes Jetronic injection systems

This high-quality fuel accumulator is suitable for classic Mercedes models with a Bosch K-Jetronic or KE-Jetronic injection system. The accumulator ensures that the fuel system remains under pressure after the engine is switched off, which is essential for a reliable warm start and stable operation of the injection system.

A properly functioning fuel accumulator prevents pressure loss and helps prevent vapor formation in hot fuel lines. As a result, the fuel supply remains reliable even after a period of inactivity.

Main function of the fuel accumulator

• Maintains residual pressure in the fuel system.
• Prevents pressure loss after switching off the engine.
• Reduces the risk of vapor formation in hot fuel lines.
• Supports a fast and reliable warm start.
• Contributes to the stable operation of the injection system.

Suitable for Mercedes models

• Mercedes SL (R107)
• Mercedes SLC (C107)
• Mercedes S-Class (W116)
• Mercedes G-Class (W460)
• Mercedes G-Class Convertible (W460)
• Mercedes W123 Sedan
• Mercedes C123 Coupé
• Mercedes S123 T-Model (Estate)

Always check the OEM part number before ordering to determine the correct application.

Symptoms of a defective fuel accumulator

• Difficulty starting with a warm engine.
• Long start time after a short standstill.
• Loss of fuel pressure.
• Irregular engine running immediately after starting.
• Residual pressure disappears too quickly after switching off the engine.

Important regarding replacement

1. Work cleanly and prevent contamination of pipes and connections.
2. Check the fuel lines for leaks and aging.
3. Check the operation of the fuel pump and the fuel filter.
4. After installation, check all connections under system pressure.
5. Check whether the fuel system maintains the prescribed residual pressure.

Advice

A defective fuel accumulator is not the only possible cause of hot start problems. A worn fuel pump, a defective check valve, leaking injectors, or a malfunctioning pressure regulator can also cause similar symptoms. Therefore, always check the entire fuel system during diagnosis.

Important

Always check before purchase and installation whether the part is suitable and equivalent based on photos, description, and specifications; installed or used parts cannot be returned.