# Service bulletin LI27.19\-P\-080869

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 11037210
- Published by NHTSA: 2026\-09\-09
- Manufacturer's number: LI27.19\-P\-080869
- Manufacturer's date: 2026\-08\-29
- NHTSA component: ELECTRICAL SYSTEM

## NHTSA's summary

Complaint Temporary no start condition with check engine light and multiple warning messages. When performing a quick test, the following fault code is stored in Y3/14 ‑ Transmission control for 8‑speed dual‑clutch transmission \(DKG\): P24F100 The wake‑up line of the control unit has a short circuit to positive. Cause Possible signal timing between EZS control unit and Transmission Control Unit \(DKG\) Remedy As of 7/15/2026, new SCN coding is available for the EZS control unit. IPR will advise to open a TIPS case for EZS \(N73\), this is due to GLA models requiring support for SCN coding procedure. GLB \(X247\) and CLA \(118\) No TIPS case necessary. 1. SCN coding of EZS Control Unit 2. Clear all faults and perform extended road test with multiple drive cycles GLA \(H247\) Special function password required. 1. Verify if special procedure Central Locking ‑ Development Data is present in EZS \(figure 1\) 2. Submit a TIPS case to the Powertrain Inbox with the following information: ‑ Initial Quick Test w/ freeze frame data ‑ IPR Result ‑ DKG Control Unit Log ‑ EZS Control Unit Log ‑ Initial EEPROM data ‑ EZS special procedure menu If the vehicle has had this LI performed and P24F100 has returned, please submit a TIPS case to the Powertrain Inbox.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2026/MC-11037210-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2026/MC-11037210-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Electrical system

## Trouble codes named

P24F1

## Vehicles listed

- 2020 to 2024 MERCEDES\-BENZ AMG CLA35
- 2020 MERCEDES\-BENZ AMG CLA35 4MATIC
- 2025 to 2026 MERCEDES\-BENZ AMG CLA35 4MATIC
- 2020 to 2023 MERCEDES\-BENZ AMG CLA45
- 2020 MERCEDES\-BENZ AMG CLA45 4MATIC
- 2025 MERCEDES\-BENZ AMG CLA45S 4MATIC
- 2026 MERCEDES\-BENZ AMG CLA45S 4MATIC\+
- 2024 to 2025 MERCEDES\-BENZ AMG GLA 35
- 2024 MERCEDES\-BENZ AMG GLA 35 4MATIC
- 2026 MERCEDES\-BENZ AMG GLA 35 4MATIC
- 2021 to 2023 MERCEDES\-BENZ AMG GLA35
- 2021 to 2023 MERCEDES\-BENZ AMG GLA45
- 2021 to 2025 MERCEDES\-BENZ AMG GLB35
- 2026 MERCEDES\-BENZ AMG GLB35 4MATIC
- 2020 to 2026 MERCEDES\-BENZ CLA 250
- 2020 to 2026 MERCEDES\-BENZ CLA 250 4MATIC
- 2021 to 2026 MERCEDES\-BENZ GLA 250
- 2021 to 2026 MERCEDES\-BENZ GLA 250 4MATIC
- 2020 to 2026 MERCEDES\-BENZ GLB 250
- 2020 to 2026 MERCEDES\-BENZ GLB 250 4MATIC

JSON: [/v1/bulletins/11037210](/v1/bulletins/11037210)

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