Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Upper Control Panel Control Unit, Basic Function - GF54.21-P-9898A
Model All (4xWD)
Model All (CAR)
Example illustration of upper control panel control unit
Example illustration of upper control panel control unit (telematics unit version NTG 7)
Overview
This document contains information on:
- General information
- Function requirements
- Function
General information
Various functions can be selected using the control elements (2 to 11) on the upper control panel control unit (1), e.g. the stationary heater, volume adjustment or switch head unit on and off.
Indicators can also be located in the upper control panel control unit (1), e.g. for switching off the front passenger airbag or the anti-theft alarm system (ATA).
Depending on the vehicle Model, the upper control panel control unit (1) may be located in the center of the bottom section of the instrument panel.
Function requirements
- Circuit 30t ON
Function
The type, location and number of control elements and indicators in the upper control panel control unit (1) vary depending on the Model and equipment.
The buttons on telematics unit version NTG 7, with the exception of the hazard warning light system button, are designed to be touch-sensitive.
Depending on the Model, the fingerprint sensor button (7) and the display angle button are located in the upper control panel control unit (1).
On vehicles with NTG 7, the upper control panel control unit (1) is connected to the vehicle's network architecture.
Mercedes-Benz is introducing so-called native in-CAR payments with the new "Mercedes pay +" digital payment service. For native in-CAR payment, the vehicle, even in conjunction with the fingerprint sensor, enables biometric two factor authentication. It is no longer necessary to enter a PIN on the MBUX Infotainment system or to authorize payment through an additional mobile device such as a smartphone. Visa Cloud tokens offer an additional layer of security in this process, since they protect and encrypt sensitive payment information by converting and storing data securely. To be able to use "Mercedes pay +", a VISA payment card must be connected to the vehicle.
| Component part descriptions | |||
| Upper control panel control unit, component description | Model 223 | GF54.21-P-6040A | |
| Model 206 | GF54.21-P-6040C | ||
| Model 297 | GF54.21-P-6040D | ||
| Model 295 | GF54.21-P-6040E | ||
| Model 232 | GF54.21-P-6040F | ||
| Model 214 | GF54.21-P-6040K | ||
| Model 294 | GF54.21-P-6040N | ||
| Model 296 | GF54.21-P-6040GG | ||
| Model 290 | GF54.21-P-6040FR | ||
| Model 254 | GF54.21-P-6040H | ||
| Model 192 | GF54.21-P-6040R | ||
| Model 236 | GF54.21-P-6040S |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.