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Womala Coolant Expansion Tank Cap OE 2105010715 for Mercedes Benz Engine Cooling System Parts
The Coolant Expansion Tank Cap (OE: 2105010715) is a critical sealing and pressure-regulating component of the cooling system for specific Mercedes Benz models (210262 E 240, 203035 C 180, 220070 S 430, 220065 S 320, 220173 S 55 AMG). Installed on the coolant expansion tank, it maintains the cooling system’s sealed state and controls internal pressure—this pressure increase raises the coolant’s boiling point, enhancing heat dissipation efficiency. As an OE-grade part, it meets Mercedes Benz’s strict standards for pressure resistance, sealing performance, and temperature tolerance, ensuring reliable operation even in high-temperature under-hood environments.
Constructed from high-quality materials: the cap body uses heat-resistant plastic (to withstand long-term exposure to high temperatures), while the internal seal ring is made of oil- and coolant-resistant rubber (for tight sealing). It also includes a pressure relief valve to prevent overpressure damage to the cooling system.
Core Functions
Pressure Regulation: The primary function is to maintain the cooling system’s specified pressure, raising the coolant’s boiling point to improve heat dissipation efficiency and prevent overheating.
Sealing Protection: Creates a tight seal on the expansion tank, preventing coolant leakage and avoiding contamination from external dust or debris.
Overpressure Relief: Features a built-in pressure relief valve that opens automatically when system pressure exceeds the safe range, protecting the radiator, hoses, and other cooling components from damage.
Compatible Vehicles
This Coolant Expansion Tank Cap is tailored for the following Mercedes Benz models and its respective OE number:
Item
Details
Product OE Number
2105010715
Mercedes Benz Model
210262 E 240 203035 C 180 220070 S 430 220065 S 320 220173 S 55 AMG
Notes: This Coolant Expansion Tank Cap is model-specific and designed exclusively for the listed Mercedes Benz models. Do not use it for other models or variants to avoid issues like improper pressure regulation, coolant leakage, or reduced cooling system efficiency. During installation, ensure the cap is tightened to the specified torque (per manufacturer guidelines) to guarantee a tight seal—over-tightening may damage the cap or expansion tank thread, while under-tightening can cause pressure loss. Periodically check the cap’s seal ring for cracks, hardening, or wear, and replace the cap immediately if faults are found to maintain the cooling system’s normal pressure and sealing performance.
Frequently Asked Questions
Q: How to determine if the bumper bracket needs replacement?
A: Signs of a failing bumper bracket include visible damage or deformation, misaligned bumper panels, unusual noises from the front end, or if the bumper appears loose or sagging on one side.
Q: What should be paid attention to when replacing the bumper bracket?
A: For optimal results, we recommend professional installation. Key considerations include ensuring proper alignment of all mounting points, checking for additional damaged components, and verifying all fasteners are properly torqued to specification.
Why Choose Our Products
Extensive Industry Experience: 13 years specializing in Auto Parts auto parts with precise product matching and technical solutions.
Quality Assurance: 10-stage quality inspection process including durability testing, surface roughness analysis, and dimensional verification.
Manufacturing Excellence: 15,000㎡ production base with 10,000+ SKUs in inventory for fast order fulfillment.
Strategic Partnerships: Collaborations with 50+ factories including suppliers to international brands like Womala and Hella.
Company Profile
Established in Guangzhou China, Womala Auto parts as a comprehensive company with five branches has engaged in Auto Parts parts for more than 10 years.There are hundreds of professional staff working in our supply department, sales and logistic support departments.Thanks to the deep... Company Profile
Established in Guangzhou China, Womala Auto parts as a comprehensive company with five branches has engaged in Auto Parts parts for more than 10 years.There are hundreds of professional staff working in our supply department, sales and logistic support departments.Thanks to the deep...