What is Mercedes-Benz factory option code 421?

9G-TRONIC Automatic Transmission (Drivetrain & Engine): 9-speed automatic transmission providing extremely smooth and fast gear shifts. This transmission enhances fuel efficiency and comfort. Ensure gear changes are smooth without jerking or hesitation, especially when shifting between D and R.

Factory Equipment Codes

What is Factory Option Code 421?

Official factory specification for 9G-TRONIC Automatic Transmission (Drivetrain & Engine).

Specification & Capabilities

9G-TRONIC Automatic Transmission is classified under the Drivetrain & Engine category.

Code 421 - 9-speed automatic transmission providing extremely smooth and fast gear shifts.

STANDARD CODE IDENTIFIERCode 421

EQUIPMENT CATEGORYDrivetrain & Engine

Used Car Buyer Checklist: Code 421

This transmission enhances fuel efficiency and comfort. Ensure gear changes are smooth without jerking or hesitation, especially when shifting between D and R.

🚨 Avoid Retrofit Frauds:Always decode the VIN configuration rather than relying on visual trims. Sellers frequently install visual replicas (such as speaker covers or AMG body panels) on standard vehicles to charge a premium. A genuine datacard decode matches the vehicle's manufacturing specifications on the day it rolled off the assembly line.