Mercedes-Benz AMG GLE43 2020 — technical service bulletin
Bulletin LI83.40-P-071168 · NHTSA communication 10177556 · issued Jun 16, 2020
Technical service bulletin
communication type
Equipment
component
2020
model years
3
vehicle entries
Official summary
In some operating statuses, a low-frequency (approx. 140 Hz) humming noise may be heard in the air conditioner housing. The air flow may be causing the seals of the flaps in the air distributor housing to vibrate. The air distribution box must be replaced.
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.