2021 Mercedes-Benz AMG GT Acronyms and Control Unit Guide
This Mercedes-Benz technical guide (LI00.01-P-078887) provides a comprehensive reference for technicians, covering common acronyms, control unit identification methods, network architecture, and platform-to-Baumuster mappings for the 2021 Mercedes-Benz AMG GT.
David Chen2021 Mercedes-Benz AMG GT
This Mercedes-Benz technical guide, identified as Topic Number LI00.01-P-078887, Version 2, is a comprehensive reference document for trained service technicians. It aims to standardize technical language and provide quick lookups for various vehicle components and systems. The guide was last updated on June 17, 2025, with the addition of "IDP" to its acronym list.
The document is intended to help technicians understand commonly used acronyms, identify control unit names and numbers, and quickly reference network/wiring architecture groups and platform-to-Baumuster mappings. This information is crucial for accurate diagnosis, service, and repair of Mercedes-Benz vehicles, including the 2021 Mercedes-Benz AMG GT.
Acronyms and Definitions
This Mercedes-Benz technical guide includes a detailed list of acronyms commonly used in technical literature and diagnostic cases. Understanding these terms is essential for effective communication and troubleshooting.
| Acronym | Definition |
|---|---|
| AV | Actual Values |
| CU | Control Unit |
| CUL | Control Unit Log |
| DTC | Diagnostic Trouble Code |
| E-Stand | Fresh-up head unit boot software (found in head unit control unit log) |
| FUP | Fresh-up |
| FW | Firmware |
| HSVL | High Speed Video Line |
| HU | Head Unit |
| HW | Hardware |
| IPD | Injector Performance Data |
| ISU | Initial Start Up |
| LVDS | Low Voltage Differential Signal |
| NSFT | Not Safe For Transport |
| MOPF | Model Facelift (Ex: 167 MOPF) |
| PiH | Plug-in Hybrid |
| P3 Hybrid | AMG Plug-in Hybrid with rear drive unit |
| SA Code | Sonderausstattungscode (Option Code) |
| SCN | Software Calibration Number |
| SW | Software |
| TCU | Telecommunication Control Unit (Hermes/Ramses/Etc...) |
| QT | Quicktest |
| XD | XENTRY Diagnosis |
Control Unit Identification
For proper vehicle diagnosis, technicians need to accurately identify control units. This guide outlines the key identifiers used for control units, which are typically found in the "Control Unit Nomenclature" attachment (not provided in full here, but referenced in the original document). These identifiers include:
- Control Unit Name
- Control Unit Number
- Control Unit Short name
- Control Unit Diogenes ("dy-oj-uh-neez") name - Control unit variant/family
Network/Wiring Architecture to Baumuster Quick Reference
Mercedes-Benz vehicles utilize different network architectures, often referred to as "Star" systems. This section provides a quick reference for which Baumuster numbers (internal model codes) are associated with each Star architecture.
Star 1
- 117, 156, 246 (MFA)
- 166, 176, 221, 242, 246, 292
Star 2
- 205, 213, 238, 253, 257, 290 (MRA)
- 117, 156, 246 (MFA)
- 118, 177, 243, 247 (MFA2)
- 167, 222, 292, 463, 465, 906
Star 3
- 294, 295, 296, 297 (EVA2)
- 206, 214, 223, 236, 254 (MRA2)
- 192 and 232 (MSA)
- 907
Platform to Baumuster Quick Reference
Mercedes-Benz vehicles are built on various platforms, each corresponding to a range of Baumuster numbers. This reference helps technicians identify the underlying platform for a given vehicle model.
MRA = "Mercedes-Benz Rearwheel Architecture"
- 205
- 213
- 222
- 238
- 253
- 257
- 290
MRA2 = "Mercedes-Benz Rearwheel Architecture - Generation 2"
- 206
- 214
- 223
- 236
- 254
MFA = "Mercedes-Benz Frontwheel Architecture"
- 117
- 156
- 246
MFA2 = "Mercedes-Benz Frontwheel Architecture - Generation 2"
- 118
- 177
- 243
- 247
EVA1.5 = "Electric Vehicle Architecture"
- 243
EVA2 = "Electric Vehicle Architecture - Generation 2"
- 294
- 295
- 296
- 297
MSA = "Mercedes-Benz Sport Architecture"
- 192
- 232
MMA = "Mercedes-Benz Modular Architecture"
- 174
Important Disclaimer for Technicians
This Mercedes-Benz technical guide is intended solely for use by trained, professional technicians with the necessary knowledge and tools to perform diagnosis and repairs on Mercedes-Benz vehicles. It provides information about conditions that could occur and assists in proper vehicle diagnosis, but it does not indicate that a defect is present in any vehicle or imply warranty coverage. Technicians must use their diagnostic skills, as multiple causes can lead to similar symptoms. The information in this document does not guarantee warranty coverage nor does it extend the vehicle's warranty.
Source: NHTSA ID 11019746
Frequently Asked Questions
- What is the primary purpose of the Mercedes-Benz technical guide LI00.01-P-078887?
- The primary purpose of this Mercedes-Benz technical guide is to provide workshops with helpful reference language, including common acronyms, control unit identification methods, and quick references for network architecture and platform-to-Baumuster mappings.
- Where can I find definitions for common Mercedes-Benz acronyms like DTC or SCN?
- This technical guide includes a comprehensive list of acronyms and their definitions. For example, DTC stands for 'Diagnostic Trouble Code' and SCN stands for 'Software Calibration Number'.
- Does this document indicate that my 2021 Mercedes-Benz AMG GT has a defect?
- No, this document is for informational purposes for trained technicians and does not indicate that a defect is present in any vehicle. It provides reference information to assist in diagnosis and repair, but does not imply warranty coverage or confirm a specific vehicle issue.
- What are Baumuster numbers and how do they relate to vehicle platforms?
- Baumuster numbers are internal Mercedes-Benz model codes. This guide provides quick references, linking these numbers to specific vehicle platforms like MRA (Mercedes-Benz Rearwheel Architecture) or MFA (Mercedes-Benz Frontwheel Architecture), helping technicians understand the vehicle's underlying architecture.
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