8 PCS 722.9 7-Speed Automatic Transmission Solenoids for Car Engine Replacement W221 S300 S350 S500 S550 S600 Material: metal components Performance: tested before shipment for consistent Compatibility: reference list available for model fitment Interchange : W221 S300 S350 S500 S550 S600 Package Contents: 8 pieces of 722.9 7-speed automatic transmission solenoids Design: finish as shown with construction These 722.9 7-speed automatic transmission solenoids are constructed using metal components to support long-term use.Each unit is tested prior to shipment to verify functionality and performance.Designed for compatibility with various models, including those corresponding to part numbers W221 S300 S350 S500 S550 S600, they provide a direct fit for simplified integration into the transmission system.The design supports straightforward installation without the need for modifications, making them suitable for both professional and DIY applications.