B224E on 2016-2023 Mercedes-Benz GLE (GLE 350, GLE 400, GLE 450) — Control Unit 'Trunk Lid/Tailgate Control' Has A Malfunction - Internal Electrical Fault
1 vehicles · 1 makes · $300-$1,300 repair
Most Reported On
B224E is an OBD-II diagnostic trouble code meaning “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. This code is most commonly reported on 2016-2023 Mercedes-Benz GLE (GLE 350, GLE 400, GLE 450), with repair costs ranging from $300 to $1,300.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
B224E does not use the standard P/B/C/U prefix. It may be a manufacturer-specific code, so verify that a scanner supports your exact year, model and module before buying.
FAQ
What does B224E mean?
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.
What are the most common causes of B224E?
The most common causes of B224E are: 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. The specific cause varies by vehicle.
How much does it cost to fix B224E?
Repair costs for B224E range from $300 to $1,300, depending on the vehicle and root cause.
Which vehicles are affected by B224E?
Au7o has documented B224E across 1 vehicle models from 1 manufacturers: Mercedes-Benz.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.