Engine Coolant Reservoir Bottle for Mercedes Benz E-Class - Direct Fit

In this review the focus is on the TRQ engine coolant reservoir bottle designed as a direct fit replacement for a range of Mercedes Benz E-Class and CLS models. The bottom line: this is for owners who need a faithful OE-style replacement that installs without modification and restores a leaking or damaged expansion tank to factory routing and function. Our review finds that the part delivers reliable fit and function across compatible model years and represents a practical, budget-conscious repair option.

Key Features

• Direct Fit: Installs in place of the original tank with no trimming or extra brackets required for the specified Mercedes Benz models.
• OE Replacement: Built to replace the original expansion tank and match the routing and mounting points found on the factory unit.
• Vehicle Specific Fitment: Listing includes specific model year compatibility so buyers can verify fit before purchase.
• Aftermarket Reference: Cross-references common replacement numbers such as 603283 to simplify parts matching during repairs.
• Durable Construction: Customers report solid build quality and longevity, making it a sensible replacement for an aging or cracked reservoir.

Who It's For

This reservoir is best for owners of compatible Mercedes Benz models - including E320, E350, E500, E550, E55 AMG, E63 AMG and several CLS variants from model years shown in the listing - who need a dependable replacement that maintains original mounting and hose locations. It suits DIY mechanics and independent shops looking to restore coolant system integrity without sourcing an OEM dealer unit.

It is not for vehicles outside the listed model years or for applications that require a different reservoir shape or capacity; buyers should check the vehicle specific fitment information in the listing and compare reference numbers before ordering.

Pros & Cons

Pros

• Good fit for listed Mercedes models, with customers noting ease of installation and no need for modifications.
• Solid build quality and durability reported by users, giving confidence the part will last under normal use.
• Functionally restores coolant system performance and is a cost-effective alternative to an OE dealer unit.

Cons

• Screw hole alignment received mixed feedback from some customers, so careful inspection during installation is advised.

Specifications

Our Verdict

The TRQ coolant reservoir is a practical replacement for owners of the supported Mercedes Benz E-Class and CLS models who want an inexpensive, direct-fit part that restores coolant system function. Given the reported ease of installation, solid build quality, and compatibility references, it offers good value for a routine repair, provided buyers confirm fitment and check screw hole alignment during installation.

Frequently Asked Questions

Will this reservoir fit my E350?
Check the listing fitment: it is compatible with 2006-09 Mercedes Benz E350 models when the front mounting and hoses match the original configuration.

Is any modification required to install?
Most buyers report no modifications are required for compatible models; verify fitment and reference numbers before installation.

Does it come with mounting hardware?
The listing specifies the reservoir only; confirm if any clips or screws are needed prior to installation and reuse original hardware where possible.