Mercedes-Benz S 580 2021 — technical service bulletin
Bulletin LI15.40-P-073663 · NHTSA communication 11005285 · issued Jul 2, 2024
Technical service bulletin
communication type
Engine
component
2021
model years
2
vehicle entries
Official summary
Complaint Check engine light illuminates. No driveability complaint. Fault codes U0115 and U0168 stored in ISA control unit Cause ISA control unit software Remedy Clear fault codes and perform a test drive. If fault does not return and no other symptoms present the vehicle can be returned to the owner. These fault codes will not lead to driveability complaint. After 3 drive cycles the check engine light is turned off. SW 20.B version includes solution for this complaint and has been released
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.