Harsh shifts from 1st to 4th and jolts when pulling away (AMG 43 and C 63 S E Performance with M139)

Engine / equipment

Mercedes-AMG C 43, SL 43 and C 63 S E Performance (M139, 2.0) with the 725.1 gearbox

Period mentioned

2022–2025 (US model years)

Symptoms

Harsh 1st-to-2nd, 2nd-to-3rd and 3rd-to-4th shifts, jerky shifting and a jolt when accelerating from a stop.

Possible cause described

The gearbox software learns clutch fill times and torque values that are too high. In the E Performance, shifting also gets worse when the high-voltage battery drops below 25 %. Mercedes-Benz describes it in technical note LI27.60-P-076554.

Check for the garage

Ask the garage to check the gearbox software level (VGS) and apply note LI27.60-P-076554 (update, oil level and valve flushing) before replacing parts.

Cost cited in the source

No verified estimate; ask the garage for a quote.A rough figure from the original database, not an up-to-date quote.

Sources from the original database