URO 1245000406 Engine Coolant Reservoir Cap

Engine Coolant Reservoir Cap for Mercedes-Benz

This URO engine coolant reservoir cap is a direct-fit replacement for a wide range of Mercedes-Benz cooling systems. Built to OE cap dimensions and factory pressure-tested, it is made for dependable sealing on original and aftermarket coolant recovery tanks.

• Guaranteed fitment for listed Mercedes-Benz applications
• Precision-molded to OE cap dimensions for proper compatibility
• Quality cap and seal materials resist engine heat and cooling system exposure
• Factory pressure-tested for sealing performance
• 24 Month Unlimited Mileage Warranty

Fitment and application details

Compatible With Mercedes-Benz models including SLK230, SL500, SL600, C230, CL500, CL600, S320, S420, S500, S600, and many additional applications across 1968-2004 model years. Fits 1998-2004 Mercedes-Benz SLK230, N/A; Fits 1999-2002 Mercedes-Benz SL500, N/A, only used with un-modified Expansion Tank; Fits 1994-2002 Mercedes-Benz SL600, N/A, up to F138417. Part number 1245000406 is also referenced for select Mercedes-Benz cooling system service needs.

This part cross-references VAICO (e.g., V30-0039) for the same application.

What this cap helps address

• Coolant loss caused by a worn or weak reservoir cap seal
• Pressure retention issues in the expansion tank
• Steam, seepage, or residue around the coolant reservoir neck
• Improper cap fit from an aged or damaged original cap
• Cooling system service needs on Mercedes-Benz vehicles with OE-style tanks

Installation notes and tips

Verify the reservoir style and any chassis or tank notes before installation. Some applications require an un-modified expansion tank, and certain models are limited by chassis number or cap marking. Confirm the cap seats fully and locks in place before returning the vehicle to service. Part number 1245000406 should be matched to the listed fitment details for proper application.

Quality assurance

URO manufactures this coolant reservoir cap with OE-style dimensions and heat-resistant materials, then pressure-tests it at the factory to help confirm sealing performance. It is backed by a 24 Month Unlimited Mileage Warranty.