Is your Mercedes A-Class (W176 model) leaking coolant or showing low level warnings? This might be the fix. It's a brand new coolant expansion tank (also called a header tank) from BaHuHa. The part includes the tank itself AND the cap. It's a direct replacement for Mercedes OEM part numbers A2465000049 and 2465000049. The manufacturer part number is BE21-2428. The seller states it's been 100% leak tested and durability tested, so you can install it with confidence. The coolant tank is where you check and fill your coolant, and it handles the expansion as the engine heats up. If yours is cracked or discolored, replacing it can prevent overheating and coolant loss. A relatively simple repair that can save you from bigger engine problems. Get your cooling system back in shape.