Mercedes clk320 dash led for the outside temp is going out?

If the outside temperature LED display on your Mercedes CLK320 is going out, it may indicate a faulty temperature sensor or a wiring issue. You can start by checking the sensor's connection and wiring for damage or corrosion. If everything appears intact, the sensor itself may need to be replaced. Consulting a professional mechanic or visiting a dealership is advisable for accurate diagnosis and repair.