Part numbers: 2198200521, 2198200621, A2198200521, A2198200621 replacement for old or damaged door mirror turn signal lights. This product is designed to fit and function as a direct substitute, ensuring reliable performance without compatibility concerns. Key benefits material: Made of durable plastic that is dustproof and shockproof, delivering long service life. Weather resistant: Waterproof even in rainy days and not afraid of bad weather, providing practical and durable operation. Safety enhancement: Helps other road users see your vehicle from a greater distance, contributing to improved driving safety and reaction time in potential incidents. Application and compatibility Vehicle compatibility: Door mirror turn signal light compatible with MercedesBenz CLS C219 20042011 and SClass W221 20052013 models. Performance and reliability Functionality: Serves as a reliable turn signal light for the door mirror, maintaining visibility and signaling intention to other drivers. Build quality: Designed for durability in daily use and challenging weather conditions. Use scenarios Scenario 1: Replacing worn or damaged mirror turn signals on MercedesBenz CLS C219 (20042011) to restore original signaling performance. Scenario 2: Replacing or upgrading the mirror turn signal on MercedesBenz SClass W221 (20052013) for restored signaling and appearance. Scenario 3: Routine maintenance or refurbishment when restoring signal function, and during driving in rain or adverse weather to maintain clear signaling visibility.