Rein EPT0260 Engine Coolant Reservoir - Radiator

Engine Coolant Reservoir for Mercedes-Benz S-Class

Rein EPT0260 is an OE-quality engine coolant reservoir built for Mercedes-Benz S-Class applications that require a replacement expansion tank without a cap. It is molded from virgin plastic in a natural finish to help maintain durability through repeated heat cycles and long-term coolant exposure.

Compatible with 2015-2021 Mercedes-Benz S-Class models listed below, including S450, S560e, S550e, and S63 AMG applications. Rein EPT0260 is a direct-fit style replacement for drivers servicing a leaking, cracked, or aging coolant reservoir.

Key Features

• Engine coolant reservoir / expansion tank
• OE-quality replacement for Mercedes-Benz cooling system service
• Virgin plastic construction for improved resistance to heat-cycle cracking
• Natural plastic finish
• Twist-on cap type
• Cap not included
• No mounting hardware included
• No mounting brackets included

Detailed Description

Rein Automotive EPT0260 is engineered to match the fit and material expectations of the original expansion tank used in select Mercedes-Benz S-Class vehicles. The reservoir is produced from virgin plastic rather than regrind material, helping the tank maintain structural integrity under repeated thermal cycling. This makes it a practical replacement when the original coolant reservoir shows signs of stress, discoloration, or leakage. This part cross-references Mercedes-Benz OE number 2225000949 for the same application.

Compatible With 2015-2017 Mercedes-Benz S550e, radiator; 2018-2020 Mercedes-Benz S450, N/A; 2018-2020 Mercedes-Benz S63 AMG, N/A, coupe; 2019-2020 Mercedes-Benz S560e, radiator; and 2021 Mercedes-Benz S63 AMG, N/A.

What It Helps Fix

• Coolant loss from a cracked expansion tank
• Visible plastic fatigue from heat cycling
• Reservoir seepage around the tank body
• Cooling system service needs on Mercedes-Benz S-Class models
• Replacement of a worn or damaged coolant reservoir without a cap

Installation Notes and Tips

Verify the vehicle’s reservoir style, cap requirement, and mounting layout before installation. Transfer any reusable components only if they are in serviceable condition, and inspect hoses, seals, and nearby cooling system parts for wear while the reservoir is removed. Confirm fitment against the vehicle’s year, model, and position listing before ordering.

Quality Assurance

Rein Automotive focuses on OE-quality cooling system replacement parts built to meet original fit and material expectations. EPT0260 is manufactured from virgin plastic to support durability in demanding engine bay conditions and to help maintain long service life in Mercedes-Benz S-Class cooling system service.