Turbocharger Oil Feed and Return Lines May Leak – 2020 Mercedes-Benz C-Class, E-Class, & GLC-Class

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June 22, 2020 NHTSA CAMPAIGN NUMBER: 20V364000

Turbocharger Oil Feed and Return Lines May Leak

An oil leak in the presence of an ignition source such as hot engine or exhaust components can increase the risk of a fire.

 

NHTSA Campaign Number: 20V364

Manufacturer Mercedes-BenzeBay USA, LLC.

Components ENGINE AND ENGINE COOLING

Potential Number of Units Affected 88

 

Summary

Mercedes-BenzeBay USA, LLC. (MBUSA) is recalling certain 2020 C300, E350, and GLC300 vehicles equipped with turbocharged 4-cylinder gasoline engines. The screws that retain the turbocharger oil feed and return lines may not have been properly tightened, possibly resulting in an oil leak.

 

Remedy

MBUSA will notify owners, and dealers will inspect the turbocharger oil lines and tighten them as necessary, free of charge. The recall began August 17, 2020. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA’s number for this recall is 2020070017.

 

Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.

 

Check if your Mercedes-Benz has a Recall

 


2020 Mercedes-Benz C-Class
2020 Mercedes-BenzeBay C-Class

 


This is to notify you of a Recall Campaign launch regarding the mounting of the screws on the turbocharger oil feed lines on 88 Model Year (“MY”) 2020 C-Class, E-Class, and GLC-Class  (205, 213, 253 platform) vehicles.  The recall campaign will be visible on the www.safercar.gov website and may generate questions from customers. Affected VINs will be flagged in VMI as “OPEN” on August 14, 2020.

 

Issue

Mercedes-BenzeBay AG, (“MBAG”) the manufacturer of Mercedes-BenzeBay vehicles, has determined that on certain MY 2020 C-Class, E-Class, and GLC-Class vehicles (205, 213, 253 platform) equipped with a 4-cylinder gasoline engine (M264), the screws that retain the turbocharger oil feed and return lines may not have been properly torqued during the assembly process. As a result, the correct mounting of the assembly cannot be confirmed. Should the mounting assembly not meet the torque specification, the turbocharger oil feed and the return lines could detach and leak oil, which could potentially contact hot engine components, potentially increasing the risk of a fire.

 

What We’re Doing

MBUSA will conduct a voluntary recall. An authorized Mercedes-BenzeBay dealer will check the mounting of the turbocharger oil feed and oil return line on the affected vehicles and tighten them, if necessary.

 

Parts

Parts are not required for repair. The recall remedy is available and repairs can be performed as necessary.

 

Customer Notification Timeline

Customer letters will be mailed approximately one week after the remedy becomes available.

 


Code M005 corresponds to “Vehicles with 4MATIC/ALL-WHEEL DRIVE”

 

Procedure

  1. Remove air intake pipe downstream of air filter (in model 205, 213, and 253 with M264).

For basic data, see AR09.10-P-8131MRI (model 205/253).  For basic data, see AR09.10-P-8131MRH (model 213).

 

  1. Remove right charge air line upstream of charge air cooler (in model 205, 213, and 253 with M264).

Only remove charge air line, do not drain coolant and do not remove charge air cooler.

For basic data, see AR09.41-P-6817MRI (model 205/253).

For basic data, see AR09.41-P-6817MRH (model 213).

 

  1. Release coolant pump and slide towards front with connected lines (in model 205, 213, and 253 with M264 and without code M005).

Due to the “sliding towards front” of the coolant pump, the access to the screws of the oil return feed line is ensured.

For basic data, see AR20.10-P-1271MRI (model 205/253).

For basic data, see AR20.10-P-1271MRH (model 213).

 

  1. Underneath the exhaust gas turbocharger (A, figure 1), unscrew the screws (C, figure 1) and remove the bracket (B, figure 1) (in model 205, 213, and 253 with M264).

For basic data, see AR09.40-P-6036MRI (model 205/253).

For basic data, see AR09.40-P-6036MRH (model 213).

exhaust gas turbocharger

Figure 1

 

  1. Remove front lower engine compartment lining.

For basic data, see AR61.20-P-1105LW (model 205/253).

For basic data, see AR61.20-P-1105LWE (model 213).

 

  1. Retighten screws (D, figure 2) of oil feed line (E, figure 2) at exhaust gas turbocharger (A, figure 2) with 10 Nm.

 

  1. Retighten screws (F, figure 2) of oil return feed line (G, figure 2) at exhaust gas turbocharger (A, figure 2) with 10 Nm.
exhaust gas turbocharger

Figure 2

 

  1. Assemble in reverse order.

 


Chronology :

In March 2020, MBAG launched initial investigations based on a finding during internal analysis for quality assurance in the production plant that indicated that the data documenting the correct mounting of the turbocharger oil feed and oil return lines might be missing. In April 2020, analyses were started to evaluate potential effects if the torque value at the screws for the oil lines at the turbocharger did not meet specification.

In parallel, the range of potentially affected vehicles was determined. On June 15, 2020, MBAG determined that a potential safety consequence cannot be ruled out. On June 23, MBAG filed a Safety Recall for the issue. Due to a documentation error at the factory, certain potentially affected vehicles might not have been identified in the recalled production range. On September 4, 2020, MBAG determined that a safety risk cannot be ruled out and decided to extend the recall population

 


3 Affected Products

Vehicles

MAKEMODELYEAR
MERCEDES BENZeBayE3502020
MERCEDES BENZeBayGLC3002020
MERCEDES-BENZeBayC3002020

 


18 Associated Documents

Recall 573 Report – Amendment 1

RCLRPT-20V364-4904.PDF 215.378KB

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Defect Notice 573 Report

RCLRPT-20V364-7620.PDF 215.384KB

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Recall Acknowledgement

RCAK-20V364-1114.pdf 244.857KB

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Manufacturer Notices(to Dealers,etc)- Recall Campaign Initial Notification Check Turbocharger Oil Feed Line Screw Torque

RCMN-20V364-8393.pdf 99.616KB

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Recall 573 Report – Amendment 2

RCLRPT-20V364-5475.PDF 215.411KB

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Recall Quarterly Report #2, 2020-4

RCLQRT-20V364-2582.PDF 211.25KB

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ISSUED Owner Notification Letter(Part 577)

RCONL-20V364-2964.pdf 206.132KB

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Recall 573 Report – Amendment 7

RCLRPT-20V364-7726.PDF 215.659KB

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Remedy Instructions and TSB

RCRIT-20V364-7394.pdf 373.044KB

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ISSUED Owner Notification Letter(Part 577)

RCONL-20V364-2319.pdf 635.301KB

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Recall 573 Report – Amendment 4

RCLRPT-20V364-6108.PDF 215.41KB

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Recall 573 Report – Amendment 8

RCLRPT-20V364-5624.PDF 215.689KB

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Recall Quarterly Report #1, 2020-3

RCLQRT-20V364-1324.PDF 211.151KB

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Recall Quarterly Report #3, 2021-1

RCLQRT-20V364-6065.PDF 211.333KB

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Manufacturer Notices(to Dealers,etc)- Recall Campaign Launch Notification Check Turbocharger Oil Feed Line Screw Torque MY20 205, 213, 253 (C-Class, E-Class, GLC-Class)

RCMN-20V364-6583.pdf 468.256KB

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Recall 573 Report – Amendment 3

RCLRPT-20V364-3361.PDF 215.383KB

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Recall 573 Report – Amendment 6

RCLRPT-20V364-7815.PDF 215.535KB

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Recall 573 Report – Amendment 5

RCLRPT-20V364-7395.PDF 215.381KB

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