Rein EPK0029 Engine Coolant Reservoir Kit

OE Quality Expansion Tank Kit for Mercedes-Benz

The Rein EPK0029 engine coolant reservoir kit is an OE-quality replacement for select Mercedes-Benz models, including C-Class, E-Class, CLS-Class, and GLK-Class applications. It is built from virgin plastic to match or exceed original material standards and to resist cracking from repeated heat cycles.

Use this expansion tank kit when servicing a Mercedes-Benz coolant reservoir on vehicles such as the C250, C300, E350, and GLK350. Rein EPK0029 is designed for direct fitment and straightforward installation.

• Includes sensor, if applicable, and cap
• Produced from virgin plastic to meet or exceed OE specifications
• Resists cracking and wear from heat cycles to help prevent coolant loss
• Direct-fit design for easier installation
• OE-quality expansion tank kit for Mercedes-Benz cooling system service

Detailed Product Overview

Rein EPK0029 is an engine coolant reservoir kit engineered for application-specific fitment on select Mercedes-Benz vehicles. It is manufactured from virgin plastic with no regrind, which helps maintain material integrity under thermal cycling and supports long service life. This makes it a practical replacement for a worn, cracked, or leaking coolant reservoir on Mercedes-Benz C250, C300, E350, and related models.

This part cross-references Genuine 2045000749 for the same application. Rein EPK0029 is also associated with interchange numbers 2045000049 and 2045000549.

Common Cooling System Issues It Can Address

• Coolant loss from a cracked expansion tank
• Visible plastic fatigue from repeated engine heat cycles
• Reservoir leaks around the tank body
• Faulty reservoir service on Mercedes-Benz C-Class, E-Class, CLS-Class, or GLK-Class vehicles
• Replacement needs during coolant system repair or maintenance

Installation Notes and Fitment

Compatible With select Mercedes-Benz applications. Fits 2012-2018 Mercedes-Benz CLS550, N/A, w/Aux. Heater. Fits 2015-2017 Mercedes-Benz CLS400, N/A. Fits 2015-2017 Mercedes-Benz E400, N/A. Fits 2014-2017 Mercedes-Benz E550, N/A, w/Aux. Heater. Fits 2014-2016 Mercedes-Benz E250, N/A. Fits 2012-2016 Mercedes-Benz E300, N/A. Fits 2010-2016 Mercedes-Benz E350, N/A. Fits 2010-2015 Mercedes-Benz C250, N/A. Fits 2008-2015 Mercedes-Benz C350, N/A. Fits 2013-2015 Mercedes-Benz GLK250, N/A. Fits 2010-2015 Mercedes-Benz GLK350, N/A. Fits 2008-2014 Mercedes-Benz C300, N/A. Fits 2008-2009 Mercedes-Benz C230, N/A.

Verify the existing reservoir configuration, sensor provisions, and cap style before installation. Confirm vehicle-specific cooling system routing and inspect related hoses and connections during replacement.

Quality Assurance

Rein Automotive designs this OE-quality expansion tank kit to match original fit, form, and function expectations. The part is backed by a 24-month/24,000-mile warranty.