B224E on Mercedes-Benz
Control Unit 'Trunk Lid/Tailgate Control' Has A Malfunction - Internal Electrical Fault
B224E on Mercedes-Benz vehicles indicates control unit 'trunk lid/tailgate control' has a malfunction - internal electrical fault. Au7o has documented this code across 1 Mercedes-Benz model — most commonly on GLE. The Mercedes-Benz HKS tailgate control unit (N121/1, also called PTCM on the 166 platform) has detected an internal electrical fault within itself and reports its own malfunction. Mercedes documents the code with the fault-detail suffix as B224E49. Per the Mercedes-Benz bulletin, the fault is a control-unit-internal / coding condition rather than a mechanical spindle-drive failure, and the factory remedy is SCN coding of N121/1 via XENTRY Diagnostics followed by normalization (re-learning) of the liftgate control - not module replacement. Typical repair costs on Mercedes-Benz range from $300 to $1,300, depending on the specific model and root cause.
Common Causes of B224E
- •Internal fault / lost or corrupted SCN coding in the HKS tailgate control unit N121/1
- •Loss of liftgate normalization (end-stop learn values)
- •Control unit software level requiring update
B224E on Mercedes-Benz by Model
Mercedes-Benz GLE(1 issue)
- Power Liftgate Spindle-Drive / Control-Module Failure (Opens Partway Then Reverses)2016-2023
The GLE power tailgate uses a motorized spindle drive on the passenger side plus a gas strut on the driver side, managed by a dedicated Tailgate/rear-compartment control module. A very common complaint is the gate opening a few inches then stopping or immediately re-closing, intermittent operation, or the gate not moving at all. Causes range from a weak battery/blown fuse (F152 30A, F154 40A) to a failed spindle-drive motor to a control-module internal error (fault code B224E49).
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View B224E across all makes →Frequently Asked Questions
What does B224E mean on Mercedes-Benz?▼
B224E stands for "Control Unit 'Trunk Lid/Tailgate Control' Has A Malfunction - Internal Electrical Fault." The Mercedes-Benz HKS tailgate control unit (N121/1, also called PTCM on the 166 platform) has detected an internal electrical fault within itself and reports its own malfunction. Mercedes documents the code with the fault-detail suffix as B224E49. Per the Mercedes-Benz bulletin, the fault is a control-unit-internal / coding condition rather than a mechanical spindle-drive failure, and the factory remedy is SCN coding of N121/1 via XENTRY Diagnostics followed by normalization (re-learning) of the liftgate control - not module replacement. On Mercedes-Benz specifically, this code is documented across 1 model.
What causes B224E on Mercedes-Benz vehicles?▼
Common causes on Mercedes-Benz: Internal fault / lost or corrupted SCN coding in the HKS tailgate control unit N121/1, Loss of liftgate normalization (end-stop learn values), Control unit software level requiring update. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix B224E on a Mercedes-Benz?▼
Repair costs on Mercedes-Benz range from $300 to $1,300, depending on the specific model and root cause.
Which Mercedes-Benz models have B224E documented?▼
Au7o has documented B224E on 1 Mercedes-Benz model: GLE.