I am writing to express a serious safety concern regarding the Mercedes-Benz GLK 350, particularly related to the fuel pump system under the rear passenger area. It has come to my attention that the fuel pumps in these vehicles emit a strong, unpleasant odor every time the car is refueled. As a safety engineer, I can confirm that this poses a significant risk to both the driver and passengers. I have personally experienced a similar issue with a 2010 Mercedes-Benz C300, where the pumps were constructed with a substandard plastic material that, over time, will melt and start dripping from the top of the pump. This degradation of materials significantly compromises the integrity of the system, creating a serious hazard that could, in the worst case, lead to catastrophic outcomes, including fire or explosion. I strongly urge Mercedes-Benz to investigate and address this issue as a matter of priority. The potential consequences of ignoring this matter are severe, and a permanent solution must be found before any further risk is posed to the safety of vehicle occupants. Thank you for your immediate attention to this critical safety concern. I look forward to your prompt response and the implementation of necessary corrective actions. Sincerely, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

- Irvine, CA, USA

Feul leaks from the tank when the vehcle is on idling. I understand its feul pump leaking the feul. This is a gushing leak under the tank whne the car is idling no obvious leak when parked the engine is off.

- Sugar Land, TX, USA

Starting smelling fuel on left rear of car found out it was the left fuel sending unit cracked and leaking next to the fuel line nipple

- Laveen, AZ, USA

Vehicle has ~ 20K miles, brought into dealer because ABS light went on while driving saying system was inoperative. Dealer then found gas tank leak, and would not let me leave the dealer, because of the safety hazard. Search shows recall for earlier model year 2012 with same issue, but dealer says no recall for 2013. ABS sensors are also malfunctioning while driving. Two separate incidents for ABS sensors. Two been replaced within one week!

- Fort Lauderdale, FL, USA