Rein EPK0126 Engine Coolant Reservoir Kit

OE Quality Expansion Tank Kit for Mercedes-Benz

The Rein EPK0126 engine coolant reservoir kit is built for Mercedes-Benz cooling system service where a direct-fit expansion tank is needed. It includes the tank, cap, and sensor if applicable, giving you the core components needed to restore proper coolant level management on select GLE, GLS, GL, and ML applications.

Produced from virgin plastic with no regrind, this OE-quality reservoir is made to handle repeated heat cycles and resist cracking that can lead to coolant loss. Rein EPK0126 is a practical replacement for worn or damaged coolant expansion tanks on 2012-2019 Mercedes-Benz models.

Key Features

• Includes the expansion tank, cap, and sensor if applicable
• Virgin plastic construction meets or exceeds OE material standards
• Resists cracking and wear from heat cycles
• Direct-fit design for straightforward installation
• OE-quality replacement for cooling system repair

Detailed Product Overview

Rein Automotive designs this expansion tank kit to match the fit and function of the original reservoir used in the vehicle’s cooling system. The Rein EPK0126 is engineered for consistent coolant storage and pressure management, helping maintain stable operation in Mercedes-Benz GLE, GLS, GL, and ML platforms. If you are replacing a leaking or brittle reservoir, this kit provides the main components needed for a clean OE-style repair.

This part cross-references URO 1665000049 and 17138616418 for the same application.

Common Problems This Part Can Address

• Coolant loss from a cracked or split reservoir
• Warning lights related to low coolant level
• Visible plastic deterioration from repeated heat cycling
• Leaking expansion tank cap or sensor-related reservoir service
• Cooling system maintenance on aging Mercedes-Benz vehicles

Installation Notes and Fitment

Compatible With select Mercedes-Benz applications. Fits 2016-2019 Mercedes-Benz GLE400, N/A; Fits 2017-2019 Mercedes-Benz GLE43 AMG, N/A; Fits 2016-2019 Mercedes-Benz GLE63 AMG, N/A; Fits 2016-2019 Mercedes-Benz GLE63 AMG S, N/A; Fits 2017-2019 Mercedes-Benz GLS450, N/A; Fits 2017-2019 Mercedes-Benz GLS550, N/A; Fits 2017-2019 Mercedes-Benz GLS63 AMG, N/A; Fits 2016-2018 Mercedes-Benz GLE350, N/A; Fits 2016-2018 Mercedes-Benz GLE550, N/A; Fits 2016-2018 Mercedes-Benz GLE550e, N/A; Fits 2016-2017 Mercedes-Benz GLE300d, N/A; Fits 2017 Mercedes-Benz GLS350d, N/A; Fits 2013-2016 Mercedes-Benz GL350, N/A; Fits 2013-2016 Mercedes-Benz GL450, N/A; Fits 2013-2016 Mercedes-Benz GL550, N/A; Fits 2013-2016 Mercedes-Benz GL63 AMG, N/A; Fits 2016 Mercedes-Benz GLE350d, N/A; Fits 2016 Mercedes-Benz GLE450 AMG, N/A; Fits 2015 Mercedes-Benz ML250, N/A; Fits 2012-2015 Mercedes-Benz ML350, N/A; Fits 2015 Mercedes-Benz ML400, N/A; Fits 2012-2015 Mercedes-Benz ML550, N/A; Fits 2012-2015 Mercedes-Benz ML63 AMG, N/A.

Before installation, verify the reservoir shape, sensor connection, and cap style against the original part. Proper cooling system bleeding after replacement is important to help prevent trapped air and maintain correct coolant level readings.

Quality Assurance

Rein OE-quality expansion tanks are manufactured from virgin plastic to support durability and long service life. The design is intended to match OE fit and material expectations for Mercedes-Benz cooling system service.