Factory Equipment Codes

What is Factory Option Code U22?

Official factory specification for 4-Way Lumbar Support Adjustment (Interior Comfort).

Specification & Capabilities

4-Way Lumbar Support Adjustment is classified under the Interior Comfort category.

Pneumatically adjustable support cells inside the front seat backrests for lumbar posture tuning.

STANDARD CODE IDENTIFIERCode U22

EQUIPMENT CATEGORYInterior Comfort

Used Car Buyer Checklist: Code U22

Adjusted using a circular 4-way direction switch on the side of the seat base. Listen for air pump operation when holding the button. Ensure there are no air leaks causing the bolster to deflate after long drives.

🚨 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.