2024 Mercedes-Benz GLB 250

Exhaust temperature sensor or harness messed up by 8k miles just bought car with only 2k miles already in the shop 2 times

NHTSA ID

11691394

Incident

Oct 4, 2025

Rear Camera malfunction The flap of the reversing camera opens and closes by itself during forward travel, making a loud thumb noise every time the car slows down to an intersection. No camera image is displayed in the head unit. This is a driving distraction for the operator and thus a safety issue as the sound is loud and its made constantly at every stop when you slow down. Dealer was able to reproduce and said this was normal behavior. Recommended disabling the Parktronic driving assistance feature to not engage sensors, but this in itself would be inactivating an important safety feature. This problem is widely reported online.

NHTSA ID

11676547

Incident

Jul 25, 2025

1. Transmission Problem Vehicle Rolls backwards when the gear / transmission is in "Drive". It happens in these two situations: a) I am stopped at a Traffic Light which is Red. The road is at a moderate upward incline. When the Light turns Green, and I move my foot from the Break pedal to the Accelerator to move forward, the GLB rolls backwards even though the transmission is, and has been, in "Drive". b) I am backing out of my garage. Our driveway is at a moderate Backward / Downward Decline. As I reach the point where I shift the gear into "Drive", the car still continues to roll backwards. This is despite the fact that I had to depress the Brake pedal to place the vehicle in Drive. c) I have checked the settings and confirmed that the transmission is NOT in manual mode. The problem is happening when the Transmission is in automatic mode. I have been cautious and prevented an accident over the last 6 months that I have owned this car. ___________________________________ 2. Cruise Control: This is a situation is that I am driving, and I have the Cruise Control "On". I encounter the traffic to be slowing, so I push the "Cancel" button for the Cruise Control in the left bar of the steering wheel. As I manipulate the wheel to make a left turn, the "Resume" button, also in the left bar of the steering wheel, gets touched without my realization. The GLB zooms ahead violently! This is dangerous and unexpected acceleration. A corollary to this malady is that the radio suddenly blasts loud as I manipulate the steering wheel to make a right turn. The radio volume button in the bar of the steering wheel gets touched without my realization. This is dangerous. It can make the Driver jump and react suddenly to the unexpected loud noise. I REPORTED THESE 2 PROBLEMS TO MERCEDES BENZ OF NORTH AMERICA THROUGH THE WEBSITE IN DETAIL AS ABOVE ON DEC 9, 2024 THE SITE PROMISES A RESPONSE IN 24 HOURS. I HAVE NO RESPONSE

NHTSA ID

11634342

Incident

Sep 5, 2024

Every time I start my new Mercedes, the backup camera MUST recalibrate itself even if I never put the vehicle in reverse and am driving forward. This happens throughout the entire drive, every single time. The Mercedes forums all corroborate this as other models; not just the GLB, experience this. Mercedes denies anything is wrong and says this is “expected behavior for rear camera calibration”. This makes absolutely no sense why a rear camera would need to recalibrate itself on every drive even when you never place the car in reverse. Furthermore, the backup camera is the “pop out kind” so you constantly hear it popping out and popping back in. It’s extremely distracting as it continues to pop in and out as I slow in traffic at a signal or stop sign. This is with certainty, a manufacturing defect and must be remediated. Thanks for listening as it’s appreciated.

NHTSA ID

11612434

Incident

Aug 1, 2024

Complaint CEL light on with no drivability concerns. Cause Signal timing error. Remedy 167, 465: SW has been released. Update the FSAM to the latest SW version. 290, 118, 243, 247: Software is still in development. This fault code does not cause a drivability concern and will clear itself within 2-3 key cycles. The vehicle can be released back to the customer.

Single throttle lift-off clunking noise from the side shaft when moving off (audible at the outboard end). The noise is heard once in each instance when changing direction of travel. Note: Sound file in attachment Cause If the complaint is eliminated by experimentally loosening the outboard collar nut (by 1 turn), the problem is due to cracking of the microweld between the wheel bearing inner race and the joint housing of the side shaft. Note: The collar nut must always be replaced after being loosened. See also LI33.20-P-078406 Remedy Coat contact surface of side shaft with wheel bearing with Molykote paint. To do this, proceed as follows: 1. Remove side shafts 2. Clean contact surface A (see image file in attachment "Outer joint housing before") before coating with Molykote, using "spirit" (free of dust and grease) 3. Coat contact surface A (see image file in attachment "Outer joint housing after") with Molykote and leave to dry for "one hour" in removed condition 4. Reinstall side shafts Note: Before using the antifriction coating (Molykote), stir it or shake it thoroughly for (at least 1 minute).

Complaint Radio station cover art does not refresh when switching stations. The UI continues to show the old station’s artwork instead of updating to the new one. Cause When a new station change request is triggered, a temporary glitch is causing the Head Unit application to fail to overwrite the previous request. This glitch is causing the cover art mismatch in the Radio application. Remedy Please do not replace any parts. The E505.9 software is released and available in XENTRY Q3 2026.

Complaint CEL light on with no drivability concerns. Cause Signal timing error. Remedy 167: SW has been released. Update the FSAM to the latest SW version. 465, 290, 118, 243, 247: Software is still in development. This fault code does not cause a drivability concern and will clear itself within 2-3 key cycles. The vehicle can be released back to the customer.

Dear Mercedes-Benz USA Dealers, The part numbers listed in the chart below should no longer be installed, and any existing stock must be returned to your facing PDC. The deadline for all dealer returns is no later than Thursday, July 9, 2026. After July 9th, returns of these parts will no longer be accepted. These parts should be returned via ZSR Special Return, using item category SCM Authorized Part Return. Please include a copy of this NCU as your authorization to return these parts. This procedure will not affect your return allowance. All returned parts will be replaced in accordance with the chart provided below.

Complaint Service code B1 displayed in the customer menu does not match the workshop code displayed in the workshop menu, e.g., 505 or 550A, which includes a service A. Cause The root cause is currently being investigated. Remedy To determine the cause, the instrument cluster control unit (N133/1) and powertrain control unit (N127) logs are required before confirming the service or correction using XENTRY Diagnosis. Please open a TIPS case to BCE inbox with the requested information in the attachments.