NCU-2020080013

TO: Mercedes-Benz Dealer Principals, General Managers, Sales
Managers, Service Managers, Parts Managers
RE: Service Campaign 2020080013 Launch Notification
Clean SRS Control Unit Contacts
MY19-21 118, 177, 247 (CLA-Class, A-Class, GLA-Class
GLB-Class)
FROM: Gregory Gunther, Department Manager, Vehicle
Compliance and Analysis, Engineering Services
Date: September 4, 2020
IMPORTANT NEW SERVICE CAMPAIGN LAUNCH INFORMATION
IN-VEHICLE NOTIFICATION
To enhance the Mercedes-Benz customer experience, an in-vehicle notification will be sent to the affected vehicles for this
service campaign. The notification will be sent to approximately 6,000 VINs per week. An example of the message that will
appear in a flagged vehicle is shown below.
This message will appear at engine start beginning September 7, 2020 and will continue every 30 days until the service
campaign has been completed. Dealers are reminded to submit warranty claims in a timely manner to reduce the possibility of
redundant messages.
Please note that all customer inquiries should be directed to the Customer Assistance Center at 1-800-FOR-MERCEDES.
Sincerely,
Gregory Gunther
Department Manager, Vehicle Compliance & Analysis
Campaign No. :
Campaign Desc. :
2020080013
20P9192108
Clean SRS Control Unit Contacts
This is to notify you of a Service Campaign launch concerning cleaning of contacts on the SRS control unit on 38,627 Model Year ("MY") 20192021 CLA-Class, A-Class, GLA-Class, and GLB-Class vehicles. Affected VINs will be flagged in VMI as "OPEN" on September 4, 2020.
Background
Issue
What We’re Doing
Parts
Vehicle Model Year(s)
Vehicle Model
Mercedes-Benz AG ("MBAG"), the manufacturer of Mercedes-Benz, has determined that on certain
MY19-21 CLA-Class, A-Class, GLA-Class and GLB-Class (118, 177, and 247 platform) vehicles, an
increased electrical resistance may occur between the connector block of the electronic control unit and
the connector pins for the Supplemental Restraint System (SRS) wiring harness. The SRS control unit
might detect the increased resistance in various SRS circuits (e.g. driver/ front passenger airbag, seat
belt tensioner) which could lead to illumination of a warning message (yellow) and a warning lamp (red)
in the instrument cluster. The functionalities of the SRS system are not impaired.
MBUSA will conduct a Service Campaign. An authorized Mercedes-Benz dealer will inspect and clean the
SRS control unit connector contacts. Customers included in this Service Campaign will be notified
through in-vehicle notification in waves of approx. 6000 per week with subsequent notices sent every 30
days.
Special tools required. A test tool must be prepared before the work procedure is performed.
The test tool is reusable, but the cleaning pads must be replaced per the Work Instructions.
2019-2021
CLA-Class, A-Class, GLB-Class
Vehicle Populations
Total Campaign Population
38,627
Next Steps/Notes
AOMS/SOMS
AOMs – This Service Campaign may generate questions from your dealers.
While we regret any inconvenience this may cause, MBUSA is determined to maintain a high level of vehicle quality and customer satisfaction.
Please refer all customer inquiries to the Customer Assistance Center at 1-800-FOR-MERCEDES.