Mercedes-Benz E-Class (W212) E300 Hybrid System Repair
ElectricZentrum specializes in the repair of hybrid, plug-in hybrid, and electric vehicles, providing end-to-end solutions for the Mercedes-Benz E-Class (W212) E300 Hybrid. This model pairs the 2.1 CDI diesel engine with a high-performance electric motor, delivering power, efficiency, and comfort. Over time, hybrid system faults may occur that require specialized diagnostic and repair work.
Our technical team is certified in high-voltage (HV) systems and works with Mercedes-Benz-specific diagnostic equipment (Star Diagnosis / Xentry), ensuring safe interventions compliant with the manufacturer’s standards.
Hybrid system diagnostics and repair
The hybrid system of the Mercedes E300 Hybrid includes a high-voltage battery, an electric inverter, and an electric motor coupled to the automatic transmission. These components work together to maximize energy efficiency and regenerative braking. ElectricZentrum performs a comprehensive technical diagnostic, assessing HV battery condition, inverter performance, and energy flow across the power modules.
Issues in these components can cause electric start failures, messages such as “Hybrid malfunction,” or loss of traction. Using dedicated equipment and specialized technicians, we pinpoint the exact cause and apply the appropriate fix safely and precisely.
Mercedes E300 Hybrid battery repair
The high-voltage battery in the Mercedes E300 Hybrid is a critical part of the hybrid system. Over time, cell degradation can lead to reduced electric power, charging faults, or dashboard error messages. At ElectricZentrum, we carry out hybrid battery repair and reconditioning, replacing damaged modules and restoring original energy capacity.
When wear is advanced, we supply new cell packs for the Mercedes E300 Hybrid, fully compatible with the original system and tested to HV safety standards. These packs ensure factory-equivalent performance, durability, and efficiency.
Inverter and power electronics repair
The inverter converts energy between direct current (DC) and alternating current (AC), powering the electric motor and managing energy regeneration. Over time, internal faults, overheating, or communication errors with the hybrid system may occur. These symptoms indicate the need for specialized technical intervention.
ElectricZentrum performs advanced electronic repairs on Mercedes inverters, replacing failed electronic components and validating the system through insulation and load tests. After repair, the vehicle undergoes comprehensive safety and performance checks.
High-voltage system fault codes — Mercedes E300 Hybrid
During diagnostics on the Mercedes-Benz E-Class (W212) E300 Hybrid, the following hybrid/HV-related fault codes were recorded:
| Code | Description |
|---|---|
| P1D799A | High-voltage battery module contactors opened due to faulty release — HV system disabled |
| P0A8D00 | DC/DC converter supply voltage too low |
| U029287 | Communication failure with electric machine B — lost communication with electric motor module |
Reliability and service warranty
All interventions follow HV safety protocols and are performed by certified technicians. Our goal is to ensure every Mercedes E300 Hybrid maintains its original performance, range, and reliability.
ElectricZentrum provides hybrid battery repair, inverter repair, and new cell packs for the Mercedes-Benz E-Class (W212) E300 Hybrid, delivering safe, effective, warranty-backed technical solutions.