Is your Mercedes key fob looking worn, scratched, or just old? This Lunwag replacement rear cover is an easy and affordable fix! It's a new shell (the back half) for your 3-button Mercedes key remote. It's compatible with a bunch of models, including the A-Class (W169), B-Class (W245), C-Class (W203, W204), E-Class (W212, W210), CL-Class, CLK-Class, and CLS-Class from the early 2000s to around 2010. PLEASE NOTE: This is ONLY the plastic housing/case. It does NOT include the internal circuit board (PCB), buttons, battery, or key blade. You'll transfer your existing electronics into this new shell. It's made from durable ABS plastic and the installation is pretty straightforward – usually takes less than 10 minutes with a small screwdriver. Perfect for DIY repair if your current case is cracked, the buttons are worn out, or you just want to refresh the look. Always double-check your specific car model and key fob design against the pictures and compatibility list before buying to make sure it's the right part.