It wasn't the gas cap itself! It turned out to be the Fuel Tank Lid Locking Assembly . 1️⃣ Removed the wheel and wheel well liner. 2️⃣ Found that the actuator motor for the fuel door was seized/stuck. 3️⃣ Replaced the locking unit (Part # [Insert Part Number if known]). 4️⃣ Cleared the code via DAS/Xentry, and the error is gone.
Addressing B1FBD54 requires a structured diagnostic approach using the Mercedes-Benz Star Diagnosis (XENTRY) tool. Full Scan: mercedesbenz errorb1fbd54 work
According to Mercedes-Benz diagnostic systems, specifically within XENTRY, translates to: It wasn't the gas cap itself