Photo: Mercedes-Benz / edited
Mercedes-Benz USA is recalling a whopping 143,551 vehicles, ranging from the C-Class compact executive sedan to the G 63 4x4 Squared off-road behemoth. The fuel delivery module – a.k.a. fuel pump – may shut down unexpectedly due to a manufacturing problem.
The German automaker started investigating said condition back in June 2022, following a rising number of reports from outside the United States of America. Retrieved pumps were analyzed together with the supplier, Hyundam Industrial Co. from South Korea.
Sub-suppliers were also investigated. Come December 2022, both parties identified an irregularity in the raw material used by a sub-supplier for the fuel pump impeller. Hyundam and Mercedes-Benz didn't name the sub-supplier in question in documents filed with the National Highway Traffic Safety Administration.
Merc also discovered that Hyundam implemented a few changes to its production processes without informing the automaker. Changes included the switch to a different supplier for the raw material, a new injection molding process at the injection molding supplier, and more quality controls across the board.
Hyundam determined the scope of potentially compromised fuel pumps in May 2023, with Merc ultimately deciding to recall every single car and sport utility vehicle fitted with said fuel delivery modules. The Stuttgart-based automaker is aware of 2,031 warranty claims, service reports, and field reports received between August 30, 2021 through May 23, 2023.
No crashes or injuries related to the fuel pump going kaput were reported, thankfully. No fewer than 13 part numbers are listed in the document attached below, in which Merc lists a plethora of vehicles produced for the 2021 to 2023 model years. Their production dates range from June 1, 2021 to November 30, 2022.
C-Class versions included in this recall kick off with the C 300, and continue with the AMG-ified 43, 63, and 63 S. Affected vehicles further include the E 350, E 450, E 53, E 63 S, CLS 450, S 500, S 580, S 580 e, Maybach S 580, Maybach S 680, SL 43, SL 55, SL 63, GT 4-Door Coupe from the 43 to the 63 S, GLC 300, GLC 43, GLC 63, GLC 63 S, GLE 450, GLE 580, GLC 63, GLC 63 S, GLS 450 to the 63 and Maybach GLS 600, G 550, G 63, and – last but not least – the G 63 4x4 Squared.
A wise man once said to never put all of your eggs in one basket. Mercedes-Benz AG should've known better than contracting a single company for the fuel pumps of so many vehicle lines and versions. Yet still, the blame for this huge recall falls on Hyundam and the sub-supplier for not doing their jobs properly.
The impeller – as in the rotating plastic disc within the fuel delivery module – may deform because of the iffy raw material used in making said impeller. The more resistance caused by deformation, the bigger the chance for the fuel pump to shut down. The problem was allegedly remedied in production on May 1. Dealers have been instructed to replace the suspect fuel pumps with brand-new units that meet the German automaker's durability requirements. Owners will be notified by Mercedes USA before or on August 25.
Sub-suppliers were also investigated. Come December 2022, both parties identified an irregularity in the raw material used by a sub-supplier for the fuel pump impeller. Hyundam and Mercedes-Benz didn't name the sub-supplier in question in documents filed with the National Highway Traffic Safety Administration.
Merc also discovered that Hyundam implemented a few changes to its production processes without informing the automaker. Changes included the switch to a different supplier for the raw material, a new injection molding process at the injection molding supplier, and more quality controls across the board.
Hyundam determined the scope of potentially compromised fuel pumps in May 2023, with Merc ultimately deciding to recall every single car and sport utility vehicle fitted with said fuel delivery modules. The Stuttgart-based automaker is aware of 2,031 warranty claims, service reports, and field reports received between August 30, 2021 through May 23, 2023.
No crashes or injuries related to the fuel pump going kaput were reported, thankfully. No fewer than 13 part numbers are listed in the document attached below, in which Merc lists a plethora of vehicles produced for the 2021 to 2023 model years. Their production dates range from June 1, 2021 to November 30, 2022.
C-Class versions included in this recall kick off with the C 300, and continue with the AMG-ified 43, 63, and 63 S. Affected vehicles further include the E 350, E 450, E 53, E 63 S, CLS 450, S 500, S 580, S 580 e, Maybach S 580, Maybach S 680, SL 43, SL 55, SL 63, GT 4-Door Coupe from the 43 to the 63 S, GLC 300, GLC 43, GLC 63, GLC 63 S, GLE 450, GLE 580, GLC 63, GLC 63 S, GLS 450 to the 63 and Maybach GLS 600, G 550, G 63, and – last but not least – the G 63 4x4 Squared.
A wise man once said to never put all of your eggs in one basket. Mercedes-Benz AG should've known better than contracting a single company for the fuel pumps of so many vehicle lines and versions. Yet still, the blame for this huge recall falls on Hyundam and the sub-supplier for not doing their jobs properly.
The impeller – as in the rotating plastic disc within the fuel delivery module – may deform because of the iffy raw material used in making said impeller. The more resistance caused by deformation, the bigger the chance for the fuel pump to shut down. The problem was allegedly remedied in production on May 1. Dealers have been instructed to replace the suspect fuel pumps with brand-new units that meet the German automaker's durability requirements. Owners will be notified by Mercedes USA before or on August 25.
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