Mercedes W204 W212 Vacuum Tank OM651 Diesel Vacuum Container A6510700568

The Mercedes W204 OM651 Diesel Vacuum Reservoir is a component of the vacuum system designed for diesel engines, which stabilizes the available vacuum for key vehicle consumers. Thanks to its design, it supports the proper operation of the engine's auxiliary systems, ensuring consistent and predictable operation of the vacuum system in daily use. This is a practical solution for users looking for a matched component for the OM651 unit in the W204 body style.

Specifications and technical data

• SKU: A6510700568
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6510700568
• Substitutable numbers: A6510700568, A 651 070 05 68, BG
• Fuel type: Diesel
• Category: Vacuum Pumps

Purpose and Role in the Vacuum System

The vacuum reservoir in the vacuum pumps category acts as a buffer that collects and maintains the vacuum generated by the diesel engine system. In OM651 units used in the Mercedes W204, it is responsible for:

• stabilizing vacuum for actuators and control valves,
• supporting the operation of vacuum-controlled elements (e.g., flaps, actuators, selected valves),
• limiting vacuum fluctuations under variable engine load.

A properly selected vacuum reservoir helps maintain predictable engine control system response, which translates to smooth engine operation and proper cooperation with other auxiliary components.

Compatibility with OM651 Diesel Engine

The presented reservoir has been designed for use in the OM651 Diesel engine installed in the Mercedes W204 model. This means that its geometry, connection ports, and mounting method are adapted to the factory vacuum system of this model. In practice, this translates to:

• easier installation in original mounting points,
• correct routing of vacuum hoses,
• maintaining the factory system configuration without the need for modifications.

This makes the reservoir a functional choice when replacing a worn or leaking component in the diesel engine's vacuum system.

Characteristics of the Used Component

The offered vacuum reservoir is a used aftermarket part, allowing for an economical restoration of the vacuum system's functionality in the Mercedes W204 with an OM651 engine. A used component of this type is particularly attractive in situations where:

• the existing reservoir shows signs of leaks or cracks,
• there are problems with maintaining vacuum in the system,
• the component needs replacement while optimizing repair costs.

Choosing a reservoir that matches the factory specifications helps maintain stable vacuum system operating parameters without interfering with the vehicle's construction.

Benefits of Using a Dedicated Vacuum Reservoir

Replacing the vacuum reservoir with the correct one for the Mercedes W204 with an OM651 unit brings a number of practical service and operational benefits:

• reducing the risk of vacuum drops in the system,
• more predictable operation of vacuum-controlled elements,
• maintaining compliance with the factory design of the diesel engine system.

In conjunction with a properly functioning vacuum pump, such a reservoir helps maintain consistent operating conditions for the engine's auxiliary systems, which is important for both driving comfort and the durability of other components.

Mercedes Vacuum Pumps – Selection and Other Solutions

If you are looking for other components in the vacuum pumps category dedicated to this brand, check out the Mercedes vacuum pumps available in our assortment to select compatible components for your vacuum system.

Technical Support and Knowledge of Fuel Systems

When working with diesel engines, it is worthwhile to understand the relationships between the vacuum system and fuel supply. Detailed information on diagnostics, part selection by numbers, and operation can be found in the guide “Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Repair”, which facilitates informed service decisions.