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Warranty

Mercedes-Benz Dealer Principals, General Managers,
Sales Managers, Service Managers, Parts Managers

TO:
RE:

Joe Haller, Senior Manager – Warranty,
Gregory Gunther - Senior Manager, Vehicle
Compliance and Analysis, Engineering Services
FROM:

Emission Extended Warranty – M278 Catalyst

MY11-20 CL-Class (216), CLS-Class (218), E-Class (207), E-Class
(212), S-Class (221), S-Class (222), S-Class (217), S-Class
Maybach (222), S-Class (217), SL-Class (231)

DATE:

July 27, 2023

IMPORTANT EMISSIONS EXTENDED WARRANTY INFORMATION
This NCU replaces the prior NCU issued on May 11, 2023, and clarifies replacement part information.
In our continuing efforts to assure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our
customers, Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, is extending the warranty coverage on the
catalytic converter system in certain Model Year (“MY”) vehicles fitted with the M278 8-cylinder engine listed below:
-

MY2011: Original New Vehicle Limited Warranty of 4 years / 50,000 miles New Vehicle to 13 years / 156,000 miles
(whichever occurs first)
MY2012: Original New Vehicle Limited Warranty of 4 years / 50,000 miles New Vehicle to 12 years / 144,000 miles
(whichever occurs first)
MY2013: Original New Vehicle Limited Warranty of 4 years / 50,000 miles New Vehicle to 11 years / 132,000 miles
(whichever occurs first)
MY2014 – MY2020: Original New Vehicle Limited Warranty of 4 years / 50,000 miles New Vehicle to 10 years /
120,000 miles (whichever occurs first)

This extended warranty applies to the following condition that may necessitate the repair or replacement of the catalytic converter
system and is related to:
•

A check engine Malfunction Indicator Lamp (‘MIL’) may illuminate due to sulfur contamination in the catalyst.
Model
CL-Class
CLS-Class
E-Class
S-Class
SL-Class

Model Years
2011 - 2014
2012 - 2018
2012 - 2017
2012 - 2017
2013 - 2020

Mercedes-Benz USA, LLC
One Mercedes-Benz Drive

Sales Designation
CL 550 4MATIC
CLS 550, CLS 550 4MATIC
E 550 (Cabriolet), E 550 (Coupe), E 550 4MATIC
S 550, S 550 4MATIC, S 550 (Cabriolet), S 550 4MATIC Maybach, S 550 4MATIC (Coupe)
SL 550

A Mercedes-Benz Group AG Company

Sandy Springs, GA 30328

770.705.0600

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Please be advised that repairs addressing a MIL being claimed under this extended warranty must have a Quick Test uploaded
with the following fault code information and may be audited.
•
•

P042000 - Catalyst System Efficiency Below Threshold Bank 1 and/or
P043000 - Catalyst System Efficiency Below Threshold Bank 2

All repairs determined to be outside of the above guidelines or without proper documentation will be returned and the claim
debited in full. Only the following damage codes and parts can be claimed for the aforementioned repairs:
Damage Codes:
•

14332 – Catalyst

Part(s):
Quantity

Part Name

Part Numer

As needed

Catalytic Converter System

*

*The replacement parts must be determined according to the equipment variant for the vehicle identification number via the parts process in Xentry Portal.

Please note that damage incurred from abuse, accident, vandalism or other non-warrantable causes which are not covered by the
New Vehicle Limited Warranty are similarly not covered by this Extended Warranty.

IMPORTANT:
1) Always check VMI to determine if a vehicle is covered under the 10 years / 120,000 miles, 11 years / 132,000 miles, 12
years / 144,000 miles and13 years / 156,000 miles warranty period.
2) Quick Test Documentation with fault code information must be uploaded to pXD.
Please check the VIN in NetStar/VMI before scheduling the appointment for the repair. Applicable vehicles will be visible in
NetStar/VMI on July 27, 2023.
Approximately two weeks after the posting of the final NCU, a letter will be sent to owners notifying them of the warranty
extension. If customers have already paid to have a repair related to the conditions specified above, they may be eligible for
reimbursement. Please advise the customer to follow the instructions detailed below.

Mercedes-Benz USA, LLC
One Mercedes-Benz Drive

A Mercedes-Benz Group AG Company

Sandy Springs, GA 30328

770.705.0600

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Warranty

Reimbursement to Customers for Valid Repairs Performed Prior to Warranty Extension
Customers who have already paid to have a repair to the catalytic converter system resulting in a check engine MIL activation
may be eligible to receive reimbursement, as long as the repair occurred before the lapse of the extended warranty coverage
Requests for reimbursement may include expenses for Mercedes-Benz replacement parts, labor, fees and taxes. Requests for
reimbursement costs that were not related to the aforementioned conditions will not be honored.
Reimbursement may be limited to the amount the repair would have cost if completed by an authorized MercedesBenz dealership and repairs performed by a non-Mercedes-Benz dealership might not be reimbursed.
The following documentation must be presented to the authorized servicing or closest Mercedes-Benz dealership for
reimbursement.
Original or clear copy of all receipts, invoices and/or repair orders that show:
• The name and address of the person who paid for the repair.
• The Vehicle Identification Number (VIN) of the vehicle that was repaired.
• What problem occurred, what repair was done, when it was done and who repaired it.
• Only Mercedes-Benz replacement parts were used for the repair.
• Fault Code (DTCs) information belonging to this Warranty Extension (if any).
• The total cost of the repair expense that is being claimed.
• Proof of payment for the repair (copy of front and back of cancelled check, or copy of credit card receipt).
• Reimbursement will be paid by a check from an authorized Mercedes-Benz dealership.

Should you have any questions or concerns, please do not hesitate to open a Warranty Services case online.

Mercedes-Benz USA, LLC
One Mercedes-Benz Drive

A Mercedes-Benz Group AG Company

Sandy Springs, GA 30328

770.705.0600