This Len Replacement blue/white mirror glass heater with back plate is designed to damaged or foggy mirror glass on MercedesBenz vehicles of the W203 (CClass) and W211 (EClass) platforms. It supports both left and right side mirrors and is associated with part numbers 2038100121 and 2038101021. The assembly includes the mirror glass with a builtin heater and a back plate for secure mounting. Key benefits Restores clear rear visibility: quality mirror glass replaces cracked or dull surfaces, improving safety when reversing or lane changing. Defogging performance: integrated heating element quickly clears condensation and frost, enhancing visibility in cold or humid conditions. OEMlike fit and durability: engineered to match the original dimensions and mounting, providing a reliable, longlasting replacement with a robust back plate. Easy to : designed to fit standard MercedesBenz mirror housings on W203 and W211 models, reducing installation time for a professional or competent DIYer. Key attributes Functionality: mirror glass with builtin heater and back plate for secure installation. Compatibility: suitable for MercedesBenz W203 and W211 models; fits left or right door mirrors. Size and fit: standard size replacement designed to match OEM mirror glass and back plate specifications. Material: quality glass with integrated heating element; back plate provides rigid mounting support. Color/finish: blue/white mirror surface option as indicated in the product listing. Performance: reliable defogging capability paired with a clear reflective surface for improved daytime and nighttime visibility. Applications and use cases Replacing a cracked or fogged mirror on a W203 CClass or W211 EClass to restore full rear visibility and functionality. Upgrading a vehicle's manual mirror to include a builtin heater, improving visibility in rain, fog, or cold weather. Servicing a MercedesBenz mirror assembly in a or by a skilled DIY enthusiast, ensuring a proper fit for left or right mirrors on compatible models. Installation notes This replacement includes the mirror glass with back plate and is intended for vehicles within the W203/W211 family. Verify part numbers (2038100121 and 2038101021) and side orientation to ensure exact fit for your vehicle. Professional installation is recommended to ensure proper alignment and secure mounting of the back plate and glass. Care and maintenance Clean the mirror surface with nonabrasive glass cleaners and a soft, lint cloth. Avoid abrasive pads or harsh chemicals that could scratch the glass or damage the heating element. Inspect the back plate mounting points periodically and resecure if after installation.