Fuel Pump Sender Unit Lid Wrench for Mercedes W164 W251

A fuel pump sender unit lid wrench made for removing and refitting the lock ring on the fuel pump sending unit fitted to selected Mercedes models. It uses a 1/2in drive and a 22-point slotted pattern to give the correct engagement on the sender unit lid during servicing work.

Used for fuel system access during vehicle maintenance, this wrench is suited to jobs where the fuel pump or sender unit needs to be removed, inspected or replaced. It is particularly useful for garage work, workshop servicing and repair work on Mercedes M-Class W164 models from 2005 to 2011 and R-Class W251 chassis vehicles, helping avoid damage that can happen when improvised tools are used on the lock ring.

The 1/2in drive fit allows it to be used with common ratchets, breaker bars or other compatible drive tools already found in many workshops. Its 22-point slotted design is intended specifically for the sender unit lock ring, giving a more secure and controlled fit for loosening or tightening during access and refitting. For regular servicing work on the correct vehicles, having the proper wrench to hand helps keep the job more straightforward and reduces the chance of marked or rounded components.

Mercedes fuel pump sender unit lid wrench specifications

• Application: For removing and refitting the lock ring on the fuel pump sending unit.
• Drive size: 1/2in square drive for use with standard compatible workshop tools.
• Pattern: 22-point slotted wrench profile for sender unit lid engagement.
• Fitment: Suitable for Mercedes M-Class W164 from 2005 to 2011.
• Also fits: Mercedes R-Class W251 chassis.

A practical choice for regular maintenance and repair work on the correct Mercedes models.