Rein CHR0366R Radiator Coolant Hose - Upper

OE-Style Upper Radiator Hose

Rein CHR0366R is an OE quality radiator coolant hose built for European vehicle cooling systems that require a direct-fit replacement. It follows the original hose shape and branch layout for a cleaner install on Mercedes-Benz CL500, S430, S500, CL55 AMG, and S55 AMG applications.

Made from EPDM and built to SAE J20 R4 D1 standards, this branched hose is engineered for heat, salt, road debris, oil, and other contaminants. The thermoplastic quick connect fitting helps restore a secure connection at the upper hose location.

Key Features

• Direct replacement for the original upper radiator hose assembly
• Application-specific fit for Mercedes-Benz cooling system service
• Branched hose design with OE-style dimensions and connector layout
• EPDM construction for durability in high-temperature engine bay conditions
• Resists heat, salt, road debris, oil, and common underhood contaminants
• Thermoplastic quick connect fitting supports a secure OE-style connection
• Built to SAE J20 R4 D1 industry standards
• Rein CHR0366R is a direct-fit solution for European hose replacement work

Detailed Description

Rein CHR0366R is a radiator coolant hose assembly designed as a direct OE-style replacement for the upper hose position. It matches the original branch shape, centerline length, and connector style used on select Mercedes-Benz models, helping maintain proper routing and fitment without cutting, refitting, or adjusting the hose. This makes it a practical choice for Mercedes-Benz CL500, S430, S500, CL55 AMG, and S55 AMG cooling system repairs where the original hose assembly has aged, cracked, or begun to leak.

The hose uses EPDM material for dependable service in demanding engine bay conditions, and its quick connect design helps reduce installation time while avoiding issues tied to reusing old connectors and O-rings. Rein CHR0366R is also referenced by Genuine 2205010182 and 220501018264 for the same application.

Common Problems This Hose Can Address

• Coolant leaks at the upper radiator hose connection
• Cracked, swollen, or heat-aged hose material
• Fitment issues caused by trimming or adapting a universal hose
• Repeated leaks from worn quick connectors or O-rings
• Poor routing or stress on the hose from an incorrect replacement part

Installation Notes and Tips

Use this hose as a direct-fit replacement for the upper radiator hose assembly on the listed Mercedes-Benz applications. Inspect the mating surfaces, quick connect points, and surrounding cooling system components before installation. Replacing worn seals and cleaning the connection area helps support a proper seal and reduces the chance of repeat coolant loss.

Fits 2000-2006 Mercedes-Benz CL500, Upper. Fits 2000-2006 Mercedes-Benz S430, Upper. Fits 2000-2006 Mercedes-Benz S500, Upper. Fits 2001-2002 Mercedes-Benz CL55 AMG, Upper. Fits 2001-2002 Mercedes-Benz S55 AMG, Upper.

Quality Assurance

Rein designs this hose as an OE quality replacement for European vehicles, with dimensions and connector details matched to the original assembly. Part number CHR0366R is backed by a 24-month or 24,000-mile warranty.