Active hood fault on Mercedes GLA diesel

Whoa, that sounds familiar! I drive a GLA as well, and I had a similar thing happen with the active hood system fault. The message kept popping up, and it was super annoying. Did you check the hood latch sensors? I remember reading somewhere that sometimes they can get wonky and trigger the whole crash detection system thing. I'm not a mechanic or anything, but I did some digging when it happened to me. Did the error code specifically point to the acceleration sensor, or was it more generic?

Thanks for the suggestion about the hood latch sensors. The error code didn't explicitly identify the acceleration sensor, but it suggested a malfunction within the active hood system and referenced implausible signals from the deceleration sensors related to the pedestrian protection system. That led me to the acceleration sensor. Was your error code also vague, or did it directly indicate a specific component failure?

Yeah, the error code was pretty vague if I remember correctly. It was something about a general system fault in the active safety stuff. Honestly, I got a bit freaked out and just took it to a workshop. They ran some proper diagnostics and sorted it out. I'd say if you're not 100% sure about the acceleration sensor, it might be worth getting a professional opinion. Could save you some time and money in the long run!

I appreciate you taking the time to discuss this matter. Your insights have been valuable. I have now taken the vehicle to a qualified technician who confirmed the defective acceleration sensor, as suspected. The repair, including parts and labor, aligned with the initial estimate. I am grateful for your assistance in guiding me toward a swift resolution.