Dorman 603-257 Engine Coolant Reservoir - Front

Reliable Engine Coolant Reservoir for Mercedes-Benz Vehicles

The Dorman 603-257 engine coolant reservoir is designed to maintain optimal cooling system performance for various Mercedes-Benz models. Constructed from durable plastic, this pressurized reservoir ensures efficient coolant storage and circulation, helping to protect your engine from overheating.

• Material: High-quality plastic construction for durability
• Capacity: 1.7 liters to support effective coolant management
• Color: Black and clear for easy coolant level monitoring
• Dimensions: 7 inches length and 9.5 inches height with an irregular shape
• Includes mounting brackets and a pressurized cap rated up to 20.3 PSI
• Cap included for secure sealing and pressure maintenance

Detailed Product Description

The Dorman 603-257 engine coolant reservoir is engineered to meet the specifications required by multiple Mercedes-Benz models, including the C-Class (C180, C200, C230, C250, C280, C300, C350, C400, C450 AMG), CLS-Class (CLS350, CLS400, CLS500, CLS550), E-Class (E200, E250, E300, E350, E400, E550), GLK-Class (GLK250, GLK350), and SLC180. Its plastic construction offers resistance to corrosion and heat, while the black and clear design allows for quick visual checks of coolant levels. The included pressurized cap, rated at 20.3 PSI, helps maintain system pressure and prevents coolant loss. The irregular shape and included mounting brackets ensure a secure fit within the engine bay.

Common Applications and Problem Resolution

• Replacement of cracked or leaking coolant reservoirs
• Restoring proper coolant pressure to prevent overheating
• Addressing coolant loss due to faulty or missing caps
• Improving coolant level visibility for routine maintenance
• Ensuring compatibility with specific Mercedes-Benz cooling systems

Installation Notes and Tips

Before installation, ensure the engine is cool to avoid injury from hot coolant. Remove the old reservoir carefully, noting the position of hoses and mounting points. The Dorman 603-257 includes mounting brackets but does not come with additional mounting hardware, so verify existing hardware condition. Securely attach the reservoir and cap to maintain the pressurized system integrity. After installation, check for leaks and proper coolant levels during initial operation.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards, providing reliable performance and durability. The 603-257 engine coolant reservoir undergoes rigorous quality control to ensure fitment and function for Mercedes-Benz vehicles. Warranty coverage details can be obtained from the product documentation or authorized distributors.