The 48V battery in modern Mercedes models plays a crucial role in the functioning of hybrid and electric vehicles. This battery supports the electric starter motor, regenerative braking and other electrical systems that increase energy efficiency. However, wear and tear or technical faults can cause problems with this battery, often leading to error codes and performance issues. In this blog, we will take a closer look at common faults with the 48V battery in Mercedes, including relevant error codes and part numbers.
Common Troubleshooting Codes and Symptoms
1. Fault code P1AEE00
This code indicates that there is a problem with the 48V battery management system or a communication problem between the battery management and the ECU (Engine Control Unit). Symptoms that may accompany this are:
- Reduced power
- Starting problems
- Battery fault warning on the dashboard
2. Fault code P0CA700
This code indicates a problem with the voltage regulation within the 48V system. This can be related to the cables, connections or the battery cells themselves. Typical symptoms are:
- Failure to engage or disengage the electric starter motor
- Problems with regenerative braking
- Low voltage warnings on the dashboard
Parts for Mercedes 48V Battery Repairs
In case of a failure in the 48V battery system, there are specific parts that often need to be replaced or repaired. Here are the parts with corresponding numbers for quick identification and replacement:
1. 48V Battery
Part number: A0009825408
This battery is the core of the 48V system and provides power to various electrical components. When the battery does not function properly, this often leads to the above-mentioned faults.
2. Voltage Converter (DC-DC Converter)
Part number: A0009066708
The DC-DC converter is responsible for converting voltage within the car's electrical system. A faulty converter can lead to trouble codes such as P0CA700, and the Mercedes may have problems charging the battery or turning on electrical systems.
3. High voltage cables
Part number: A2055407708
Worn or damaged high voltage cables between the 48V battery and other systems in the vehicle can cause voltage loss and error codes. It is important to inspect these cables for wear or corrosion.
Additional parts and codes that may be relevant when repairing a Mercedes 48V battery include the following part numbers:
- A0009820216
- A0009820316
- A0009823317
- A0009823413
- A0009823417
- A0009823513
- A0009823516
- A0009824420
- A0009824520
- A0009825213
- A0009825313
- A0009826222
- A0009826714
- A0009826814
- A0009827116
- A0009827216
In addition, error codes such as B183349, B183371, B183384 can indicate problems such as deep discharge, internal errors or unlocking the system after an accident.
Mercedes 48V Battery Repair: What to Expect at Your Local Dealer
When a Mercedes comes in with a 48V battery problem, it is essential to first read out the error codes and perform a comprehensive diagnosis. Replacing the 48V battery or voltage converter can be relatively simple, but it does require the right technical knowledge and tools.
Expected Repair Costs
The cost of repairing the 48V battery or voltage converter can vary depending on the severity of the problem and the parts that need to be replaced. On average, you should expect the following costs:
- 48V battery replacement: €1,200 - €2,000 (depending on the model and version)
- DC-DC Converter replacement: €500 - €800
- Replacing high-voltage cables: €150 - €300
Although the cost of such a repair can be significant, at Car Key repair services we can be up to 50% cheaper than standard dealer rates.
Benefits of Repair Instead of Replacement
It is often cheaper to repair parts of the 48V system instead of replacing them. At Car Key we offer not only replacements, but also repairs for parts such as the 48V battery and the voltage converter. This can result in significant cost savings, with up to 50% lower costs compared to replacement at an official dealer.
New Keys and Battery Service at Car Key
At Car Key, we not only have extensive repair and replacement services for the 48V battery, but we also have the largest collection of car keys in stock. In most cases, we can deliver a new key within half an hour. Even if you have lost both keys, we will solve this quickly and efficiently with a new set of keys for every car brand.
Conclusion
The 48V battery in modern Mercedes models is an essential component that may require regular maintenance and repair. Faults such as P1AEE00 and P0CA700 are common and can indicate problems with the battery, inverter or high-voltage cables. By choosing repair instead of replacement, you can significantly reduce costs. At Car Key, you are not only assured of quality repairs, but you can also count on competitive rates and fast service.
With our wide range of parts and keys in stock, we ensure you can get back on the road quickly, without the high costs of the dealer.
Book your service here: 48V Mercedes Battery Repair Service