Mercedes W205 AMG C43 Automatic Transmission A2052707502.

the part number A2052707502 refers to the 9G-Tronic (9-speed) Automatic Transmission specifically calibrated for the Mercedes-AMG C43 (W205) and GLC 43 (X253).

This is the high-performance AMG Speedshift TCT version of the 722.9 transmission’s successor. Unlike the V8 AMGs (which often use a wet-clutch MCT), the C43 uses a highly tuned torque converter setup to manage the 4MATIC all-wheel-drive system while providing snappy, multiple-downshift capability.

1. Technical Identification

• Part Number: A2052707502

• Transmission Type: 722.901 (9G-Tronic / NAG3)

• Drivetrain: 4MATIC (All-Wheel Drive)

• Max Torque Capacity: Rated for approximately 700 Nm, giving it plenty of headroom for the C43’s factory 520 Nm.

• Key Feature: “Skip-shift” technology, allowing the gearbox to jump from 9th to 5th or 7th to 3rd gear instantly for rapid acceleration.

2. 2026 Market Pricing (Estimated USD)

Replacing a 9-speed AMG gearbox is a significant investment. Prices have stabilized by 2026 as more units have entered the secondary (salvage) market.

3. Common 2026 Service Issues

By 2026, many W205 C43s are reaching the 100,000 km (60k mile) mark. The 9G-Tronic is generally reliable, but watch for:

• The “Plastic Pan” Leak: The transmission pan is plastic with an integrated filter. Over time, heat cycles can cause the pan to warp slightly, leading to slow leaks.

• Rough 2-1 Downshift: Often solved by a software adaptation reset or a firmware update. In 2026, ensuring you have the latest TCM (Transmission Control Module) software version is the first step in troubleshooting.

• Auxiliary Oil Pump: The 9G-Tronic uses an electric auxiliary pump for the Start/Stop system. If this fails, the car may struggle to engage gear smoothly after a stop.