Mercedes-Benz AMG C43 2021–2027 — technical service bulletin

Bulletin PSL-NCU Return Parts 9/18 · NHTSA communication 11037379 · issued Sep 18, 2026

Technical service bulletin

communication type

Suspension

component

2021–2027

model years

vehicle entries

Official summary

Dear Dealer Partners, The part numbers listed in the chart below should no longer be installed and any existing stock must be returned to your facing PDC. The deadline for all dealer returns is Thursday, October 8th, 2026. After October 8th, we will no longer accept returns of these parts. These parts should be returned via ZSR Special Return, using item category SCM Authorized Part Return. Please include a copy of this NCU as your authorization to return these parts. This procedure will not affect your return allowance. We will replace all returned parts in accordance with the chart below.

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.