The essentials
- 1A professional valuation report is essential for legal occasions such as inheritance or divorce due to BVSK compliance.
- 2The Premium Battery Test for electric cars delivers precise State of Health data, which significantly influences the residual value.
- 3DIAVAG offers full cost transparency with fixed prices of auf Anfrages for standard assets and auf Anfrages for premium assets.
Tuesday morning, 10:00 a.m., a driveway in Berlin-Zehlendorf. A BMW 5 Series Touring is ready for appraisal as part of an inheritance settlement. The DIAVAG appraiser arrives on time to objectively document the vehicle's condition. In under 15 minutes, the physical inspection will be complete. This structured process forms the basis for a legally sound valuation report, which is delivered as a PDF the same day. This is not about a rough estimate, but about a solid data basis for all parties involved. The appraiser's independence is the decisive criterion for acceptance by lawyers, notaries, and insurers.
Why you should have your vehicle's value professionally determined
Determining a vehicle's value is of central importance in many life situations. While a rough orientation to market prices is often sufficient for a simple private sale, formal occasions require well-founded documentation. When you get your vehicle's value determined, it is primarily about establishing the actual condition while taking all value-influencing factors into account. This includes not only mileage and age, but also maintenance history, existing damage, and the general marketability of the model.
A neutral report is essential especially in legal disputes such as divorce or inheritance cases. Here, the document serves as an objective basis for negotiation to avoid disputes over the asset's value. A professional valuation report is also often the only way to prove the correct replacement value to insurers, especially if the vehicle is exceptionally well-maintained or has high-value equipment. A simple printout from online portals is rarely accepted as proof in such contexts, as it does not take into account the individual characteristics of the specific vehicle.
Online estimate versus on-site inspection
There is a significant difference between an algorithm-based price estimate and a physical appraisal. Online tools use statistical data to calculate an average price. However, this method ignores the technical condition of the engine, tire tread depth, or hidden accident damage that can only be identified using a coating thickness gauge. Anyone who wants to get their vehicle's value determined on a legally sound basis cannot avoid an on-site inspection.
DIAVAG relies on a hybrid approach here. The appraiser comes directly to the vehicle's location, whether a private garage, a dealer's yard, or a marina. This mobile service eliminates time-consuming trips to an inspection point for the customer. On site, a standardized workflow is carried out, ensuring that every report has the same high quality. While online estimators often serve as bait offers for purchase, DIAVAG remains completely independent. No vehicles are purchased and no repairs are brokered, which guarantees the objectivity of the result.
The DIAVAG inspection workflow and hardware
The quality of a valuation depends on the technology and process used. Every DIAVAG appraiser carries a special hardware case containing calibrated measuring devices for all relevant vehicle areas. This includes an OBD2 scanner for reading the fault memory and real-time parameters of the onboard electronics. A coating thickness gauge checks the paintwork for repainting or filler, allowing conclusions to be drawn about accident history. This is supplemented by tread depth gauges and digital multimeters for checking electrical systems.
The entire on-site process usually takes less than 15 minutes. The data is captured digitally and transmitted directly into the system. Standardized photo documentation ensures that all value-relevant details are recorded in a tamper-proof manner. A senior inspector then reviews the data and signs the BVSK-compliant PDF report. This two-stage process of technical capture and expert review ensures that the report meets the highest standards and also holds up in court or before insurers.
Special features for e-cars and the Premium Battery Test
For electric vehicles, the focus of value determination shifts massively toward the drive battery. The battery is the most expensive individual component, and its condition, the so-called State of Health (SoH), largely determines the vehicle's residual value. Anyone who wants to get the value of an e-car determined receives, at DIAVAG, a fixed price of auf Anfrages for a premium report that already includes the Premium Battery Test. This test goes far beyond the basic diagnostics of conventional inspection organizations.
Among other things, cell balance, actual kWh capacity, and internal battery resistance are analyzed. This data is crucial, as two identical vehicles with the same mileage can have significantly different battery conditions due to different charging habits. A vehicle primarily charged at fast-charging stations may have a worse SoH than a garage-kept car charged slowly at a wallbox. The DIAVAG report makes these differences transparent and protects both buyers and sellers from costly financial mistakes. This is also an essential standard in view of the upcoming EU Battery Passport from February 2027.
Independence and legal usability
A central aspect in choosing an appraiser is independence. DIAVAG operates as a pure inspection body according to ISO/IEC 17020 Type A. This means there is no economic interest whatsoever in the purchase or sale of the object being appraised. Unlike many portals that offer a free valuation in order to subsequently buy the vehicle cheaply, DIAVAG delivers a neutral document. This independence is the prerequisite for reports being recognized in legal disputes.
The appraisers' qualifications follow the guidelines of the BVSK (Federal Association of Independent Automotive Experts in Germany). For questions regarding inheritance, gifts, or divorce, customers should always consult their lawyer or notary to clarify the specific requirements for the report. DIAVAG provides the technical and value-related basis, which can often serve as a reference according to JVEG (the German Judicial Remuneration and Compensation Act). Optionally, the report can be secured with a notarial hash on the Polygon blockchain to permanently guarantee the integrity of the document.
Value determination for boats, construction machinery, and home storage systems
A unique selling point of DIAVAG is coverage of a total of seven asset classes. While traditional inspection organizations such as TÜV or DEKRA mostly focus on cars, DIAVAG also offers valuation reports for boats, construction and agricultural machinery, cargo bikes, e-scooters, and PV home storage systems. Specific inspection criteria apply to each of these assets. For a boat, for example, hull integrity and propulsion technology are the focus, while for construction machinery, operating hours and hydraulic systems are critically examined.
The valuation of home storage systems is particularly relevant in the context of real estate transactions. When a house with a photovoltaic system and a power storage unit is sold, the value of these components must be precisely determined. Here too, the Premium Battery Test is used to determine the remaining capacity of the storage unit. The premium fixed price of auf Anfrages applies to these complex assets. This cross-asset competence makes DIAVAG a partner for private collectors, heirs, and commercial actors who need to have a broad portfolio of tangible assets appraised.
Digital processes for dealers and fleet operators
For commercial customers such as car dealerships, leasing companies, or fleet operators, DIAVAG offers specialized solutions. Individual terms are agreed upon from a volume of 50 reports per month. A key advantage for B2B customers is the API connection to existing Dealer Management Systems (DMS). This enables a seamless data flow and automated integration of reports into internal processes. For example, the purchasing process at a car dealership can be significantly accelerated, since mobile inspection by DIAVAG conserves personnel resources within the business.
In addition, DIAVAG offers independent appraisers the opportunity to purchase the hardware case, including the specialized software, at a list price of auf Anfrages. This enables other experts to integrate the standardized DIAVAG workflow into their own portfolio. The combination of mobile on-site data capture and central review by senior inspectors provides a scalability that traditional expert offices often cannot achieve. This is particularly significant for fleet operators active across regions who require consistent valuation quality at different locations.
Costs and scheduling in the area
Cost transparency is a core promise of DIAVAG. A fixed price of auf Anfrages applies to the standard valuation of a car, boat, or cargo bike. This includes all costs, including travel within the areas. There are no hidden fees or hourly billing. For more complex assets such as electric cars or home storage systems that require in-depth battery diagnostics, the fixed price is auf Anfrages. This pricing structure allows customers to precisely calculate the cost of a valuation in advance.
Scheduling an appointment is simple and fast. In the current areas of Hamburg, Berlin, and Munich, DIAVAG guarantees an appointment within 24 hours. Nationwide rollout is planned for 2026. Thanks to efficient digital processing, the customer usually receives the finished, legally sound PDF report on the same day as the inspection. This speed advantage is a decisive factor in choosing DIAVAG, especially in time-critical situations, such as shortly before a planned vehicle sale or when facing court deadlines.
Comparison of valuation methods
| Feature | Online estimate | Vehicle inspection station | DIAVAG report |
|---|---|---|---|
| Cost | Free / cheap | approx. 150 - auf Anfrage | auf Anfrage / auf Anfrage fixed price |
| Mobility | Digital only | Stationary on-site | Mobile at location |
| Battery Test | No | Basic diagnostics | Premium Battery Test (SoH) |
| Legal certainty | Low | Medium | High (BVSK / ISO 17020) |
| Asset classes | Cars only | Mostly cars only | 7 classes (incl. boat/storage) |
Frequently asked questions
- How much does it cost to have my car's value professionally determined?
- At DIAVAG, a standard valuation report for cars, boats, or cargo bikes costs a flat auf Anfrages. For electric cars and home storage systems, the fixed price is auf Anfrages, including a detailed Premium Battery Test.
- How quickly do I receive the finished report?
- In the areas of Hamburg, Berlin, and Munich, you receive an appointment within 24 hours. The finished PDF report is usually delivered the same day after the inspection.
- Is the DIAVAG report admissible in court?
- The reports are BVSK-compliant and signed by senior inspectors. They serve as an objective basis for legal disputes. However, for specific legal questions, you should always consult a lawyer or notary.
- Why is the Premium Battery Test so important for electric cars?
- The battery is the most expensive component of an e-car. The test determines the exact State of Health (SoH) and cell balance, which is crucial for a fair price determination when selling or buying.
- Do I need to drive the vehicle to an inspection point?
- No, DIAVAG is a mobile service. The appraiser comes directly to your home, office, or the vehicle's location, saving you time and effort.
- What other assets besides cars does DIAVAG appraise?
- DIAVAG covers seven classes in total: cars, electric cars, boats, construction and agricultural machinery, cargo bikes, e-scooters, and PV home storage systems.
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