Book a Vehicle Appraiser Appointment Online: Mobile Service at a Fixed Price

The booking process at DIAVAG is designed for maximum efficiency and transparency. Customers first select the appropriate asset class from seven categories on the platform. Customers choose from the categories of car, EV, boat, construction and agricultural machinery, cargo bike, e-scooter, and home storage system. After selecting the location within the areas of Hamburg, Berlin, or Munich, scheduling takes place. The 24-hour commitment for the inspection appointment significantly speeds up the process. This accelerates transactions, for example in short-notice sales, inheritance matters, or urgent insurance cases.

The user immediately receives confirmation and knows exactly which fixed price will be charged. Costs are calculated by asset class and diagnostic requirements as a fixed price. This price transparency distinguishes the service from classic appraisal firms, which often bill according to variable hourly rates or complex fee tables. Online booking eliminates lengthy phone calls and waiting times for cost estimates. The workflow reduces administrative effort for the customer, while technical precision is maintained through standardized processes.

Mobility is at the core of the DIAVAG service. The appraiser comes to the asset, not the other way around. This is a decisive advantage over organizations such as TÜV or DEKRA, which work primarily on a stationary basis. For the customer, there is no need to move the vehicle, which would otherwise be logistically impossible or costly, particularly for unregistered vehicles, seasonally used boats at a harbor, or stationary home storage systems in a basement. The inspection takes place directly in the garage, at the yard, at the harbor, or at the company's machine park.

The on-site inspection usually takes under 15 minutes. This time saving is made possible by a highly standardized inspection workflow. The appraiser uses a specialized software app that guides him through all relevant inspection points. This ensures that no technical details are overlooked despite the short on-site duration. Mobile availability currently extends to the metropolitan areas of Hamburg, Berlin, and Munich, with a nationwide rollout planned for 2026. Within these areas, no additional travel fees apply, underlining the predictability of the fixed price.

Despite the speed of data collection, every report is based on sound measurement data. Every DIAVAG appraiser carries a hardware case, which is also sold to independent partners. It contains calibrated measuring devices that go far beyond a purely visual assessment. An OBD2 scanner reads the fault memory and real-time parameters of the onboard electronics. The paint layer thickness gauge identifies repaints and hidden accident damage that often remains invisible to the naked eye. Tread depth gauges and digital multimeters complement the toolkit for a comprehensive condition assessment.

The Premium Battery Test is standard for EVs and home storage systems. While many competitors merely adopt the State of Health (SoH) reported by the vehicle itself, DIAVAG performs an independent diagnosis of cell balance and capacity. This is essential for value determination, since the battery often accounts for up to 50 percent of an electric vehicle's total value. The results of these measurements flow directly into the BVSK-compliant report. By using standardized hardware, comparability of reports across different locations and appraisers is guaranteed, massively increasing the objectivity of the result.

A report is only as valuable as its acceptance by third parties. DIAVAG relies on the highest standards here. All appraisers are qualified under BVSK guidelines. In addition, the service acts as an inspection body under ISO/IEC 17020 Type A. This is the highest level of independence, since DIAVAG has no vested interest whatsoever in vehicle sales, insurance, or repair services. This neutrality is the fundamental prerequisite for the admissibility of the reports in legal contexts such as divorces, inheritance disputes, or court proceedings.

The finished PDF report undergoes a final review and signature by a senior inspector. This represents an additional quality assurance layer beyond the work of the individual appraiser on site. For customers who require maximum tamper resistance, DIAVAG optionally offers a notary hash on the Polygon blockchain. This makes the asset's condition at an exact point in time permanently documented. This combination of traditional appraisal expertise and modern technology ensures that the reports withstand the strict requirements of insurers and authorities. Data is consistently stored in a GDPR-compliant manner on servers within the European Union.

DIAVAG covers a broad spectrum of asset classes. While classic vehicle appraisers are often specialized in passenger cars, DIAVAG covers seven different categories. These include, in addition to cars and EVs, boats, construction and agricultural machinery, cargo bikes, e-scooters, and PV home storage systems. This diversity is particularly beneficial for commercial customers, fleet operators, and heirs' communities who want to have different assets assessed from a single source. A farmer, for example, can have his tractor assessed while at the same time the home storage system of the photovoltaic installation is checked.

Each asset class follows a specific inspection protocol. For boats, for example, hull substance and propulsion technology are the focus, while for construction machinery, compliance with the EU Machinery Regulation and the general wear level of the hydraulic components are checked. The uniform fixed-price structure for standard and premium assets is maintained throughout. This specialization enables DIAVAG to deliver precise market value analyses even in niche markets, based on real technical findings rather than purely statistical algorithms. This is a significant advantage over pure online estimation tools, which cannot physically inspect the actual condition of an object.

For commercial customers such as dealerships, leasing companies, and fleet operators, DIAVAG offers scalable solutions. From a volume of 50 reports per month, individual terms are agreed. API integration with existing Dealer Management Systems (DMS) supports B2B customers. This enables seamless integration of the reports into the dealer's internal processes, for example for trade-ins or inventory management. The mobile service reduces vehicle downtime, since the assessment can take place directly on the company premises without tying up personnel for transport trips.

Dealers also benefit from the high acceptance of the reports in resale. An independent certificate from DIAVAG builds trust with end customers and speeds up the sales process. For larger fleets, the system also offers efficient residual value tracking. Through regular, standardized inspections, value trends can be precisely documented and future marketing strategies optimized. The combination of mobile on-site data collection and central digital evaluation makes DIAVAG a strategic partner for professional asset management in the mobility sector.

When comparing DIAVAG with established organizations such as TÜV or DEKRA, clear structural differences emerge. Classic inspection organizations are primarily specialized in statutory tasks such as the periodic technical inspection (HU). Value reports there are often a byproduct with variable pricing structures and the need to schedule an appointment at a stationary inspection center. DIAVAG, on the other hand, has fully specialized in mobile, cross-asset value assessment. A key technical edge lies in the Premium Battery Test, which DIAVAG offers as standard for all electrified assets, while many inspection centers only carry out rudimentary diagnostics here.

DIAVAG complements the classic periodic technical inspection with a specialized valuation service, offering a specialized service for precise value determination and technical condition assessment. The focus on mobility and digital processes makes the service the preferred choice for customers seeking a fast, legally sound, and uncomplicated solution.

Regulatory requirements for documenting battery data will increase massively in the coming years. From February 2027, the EU Battery Passport becomes mandatory for all new batteries in electric vehicles and stationary storage systems. DIAVAG has already aligned its processes with these requirements today. Capturing parameters such as chemical composition, charging cycles, and health status is an integral part of the inspection workflow. This secures the future viability of the reports and provides EV owners with a valuable documentation basis for later resale.

The battery passport is intended to create transparency across the entire supply chain and the lifecycle of a battery. For the secondary market, this means that vehicles without complete and independent documentation of battery condition could lose significant value. Through early implementation of these standards, DIAVAG positions itself as a pioneer in battery diagnostics. Customers who book a report including the Premium Battery Test today thus receive not only a current market value estimate but also proof that meets upcoming European standards. This secures the value of investments in electric mobility and renewable energy.

After completing the on-site inspection, digital evaluation takes place at headquarters. The finished report is delivered to the customer as a PDF document the same day. The seamless digital chain from data capture to signature enables fast delivery. The report contains a detailed list of all technical findings with full source traceability, the photo documentation, and the final market value calculation. This is based on current market data and the specific technical condition of the asset, ensuring significantly higher accuracy than purely statistical estimates.

The uses of the report are varied. Private sellers use it as a trust-building element in sales listings on platforms such as mobile.de or Autoscout24. Buyers use it to protect their investment, especially for high-value assets or EVs. In insurance cases, the document serves as the basis for determining replacement value. Through BVSK compliance and ISO certification, the report is recognized by insurers and banks as an objective basis. Digital availability also facilitates forwarding to lawyers, notaries, or authorities, significantly speeding up the handling of legal or administrative cases.