Mercedes CLA Hybrid Brake Booster Pressure Sensor Issue

Sounds familiar. I had a similar experience with my CLA. The error message and reduced brake performance are spot on. Did you recently have any work done on your brake system, like a brake fluid flush It could very well be related to how the system was bled. Do you have access to diagnostic tools to check the pressure sensor readings

Thanks for the quick response. No, I haven't had any brake work done recently. That's what's puzzling me. I do have some basic diagnostic tools, but nothing professional grade. What readings should I be looking for specifically to confirm the brake booster pressure sensor failure

Without proper diagnostic tools it will be difficult to check the readings. Given your symptoms and the error code, it's highly likely that the brake booster pressure sensor is faulty or there's an issue with the hydraulic brakes. I ended up taking mine to a workshop. They confirmed the issue and sorted it out pretty quickly. Best to get it checked, especially with brake performance being affected.

Thanks for confirming my suspicions. I appreciate you sharing your experience. I took it to a workshop, and it turned out the brake booster pressure sensor had indeed failed, likely due to improper bleeding from the factory. Replacement parts and labor cost me around 90€. Everything is working perfectly now