Dorman OE Solutions Engine Coolant Reservoir for 2018 Mercedes-Benz with Pressurized Design 603-257
Dorman OE Solutions Engine Coolant Reservoir for 2018 Mercedes-Benz with Pressurized Design 603-257
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Shipping & returns
Shipping details
In-stock orders are processed within 48 hours; transit time is additional.
International orders include export processing and customs clearance. Duties, taxes and brokerage are extra; final freight charges may change after remeasurement.
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Need help with a return? Request authorization within 30 days of delivery for eligible unused, uninstalled items. See details for exclusions and applicable fees.
Read the full return policyReturn details & how to start
Request return authorization (RMA) within 30 days of delivery for eligible items. Keep items unused and uninstalled, with original packaging and accessories. Electronics, liquids, special orders and other categories are excluded.
Email sales@frsport.com with RETURN and your order number in the subject to request an RMA. Please wait for return authorization before sending your item back.
Wrong part/size or change of mind: a 20% return processing fee applies, plus applicable shipping costs.
Original shipping is non-refundable. For orders shipped free, the actual outbound shipping cost is deducted from the refund. Return shipping is prepaid by the customer.
After payment capture, cancellations and refunds generally incur a 5% processing fee, except for our error, confirmed defects or confirmed carrier loss. The 5% and 20% fees do not stack; only the greater applicable fee applies. Store credit waives the 5% fee, but applicable return fees remain.
Missing, incorrect or transit-damaged items: report within 3 business days of receipt with photos of the product and packaging.
For defective items, contact us for help with the manufacturer's warranty process. The manufacturer decides the claim.
Specifications
- Shipping dimensions (L × W × H)
- Shipping weight
- 6.0 lb
- Barcode
- 10019495698200
Billable shipping weight; may include dimensional weight.
Pressurized coolant reservoir for 2018 Mercedes-Benz models used to replace cracked or leaking factory expansion tanks.
Built to meet the manufacturer's design intent for reliable service, this unit is constructed from quality materials engineered to withstand underhood heat and engine vibration while matching the original part's fit and function.
Key Features
- Direct replacement for specific Mercedes-Benz OEM part numbers
- Constructed from durable materials resistant to thermal stress
- Engineered to match original equipment form and fit
- Pressurized design maintains proper cooling system operation
- Validated through testing for daily driving demands
Benefits
- Restores cooling system integrity to prevent overheating
- Eliminates leaks caused by cracked or failed factory tanks
- Ensures a smooth installation with no modification required
- Reduces the risk of repeat repairs with robust construction
- Provides a trustworthy solution backed by decades of experience
Application
Ideal for Mercedes-Benz owners experiencing coolant loss or visible damage to the original expansion tank who need a dependable direct-fit replacement.
Fitment Notes
- Designed for select 2018 Mercedes-Benz vehicles
- Verify compatibility using part number 603-257 before purchase
Why Choose Dorman - OE Solutions?
- Dorman parts are engineered as direct-fit replacements designed to match OE form, fit, and function
- Built with quality materials and validated through testing to stand up to daily driving demands
- Offers a smart way to restore your vehicle with confidence in fit and durability
What's in the Box
- 1 Engine Coolant Reservoir
Item Dimensions
- 11.9in x 10.1in x 6.9in, 2.3lbs
