Autohaus Wenzel GmbH

Autohaus Autohaus Wenzel GmbH in Bonn


Upon request we are happy to provide our premium cars with the DEKRA Seal certificate. A DEKRA expert will conduct an objective, independent inspection according to strict quality criteria. We guarantee that these criteria will be adhered to. 

Autohaus Wenzel GmbH. Certified quality: the DEKRA Seal.

DEKRA list and describe the DEKRA Seal quality criteria as follows:*

Testing reveals defects and damage

Our experts only issue a vehicle with the DEKRA Seal for pre-owned vehicles when it has met certain minimum standards in various component groups. This gives you an objective report on the quality and condition of the vehicle – defects and necessary repairs are outlined in the test documentation.


Even if a vehicle does not meet the criteria for the DEKRA Seal for pre-owned vehicles and thus cannot receive a certificate, the test report gives both purchaser and seller a neutral assessment of the condition of the vehicle.


The following 8 component groups on the vehicle are subject to the quality criteria in the DEKRA Seal for pre-owned vehicles. If the test involves a truck, motorcycle and leisure/travelling trailers, the test points are expanded as necessary, e.g. the driver’s cabin of the truck or the dampness in a caravan.

The seal requires the following criteria to be fulfilled:


  • The body parts are not restricted or defective in their function.
  • No residual traces of an accident can be detected.
  • There are neither dents or bulges or other large areas of damage.
  • No strong signs of corrosion damage or impact damage.
  • The paintwork does not display obvious signs of stone chipping damage, or large scratches that reveal bare metal.
  • The paint finish has been professionally applied (differences in colour tone).
  • Add-on parts must not be missing or severely damaged.
  • The screens must not require renewal.


  • The tester should detect no odours in the interior that could be deemed highly unpleasant.
  • Seats must not display signs of heavy wear or burn marks.
  • The seat mechanics must be in order.
  • The trim, ceiling or the carpet must not display serious damage or be heavily soiled.
  • The controls must not be defective in any way.
  • Heating and ventilation must be without defect.

Engine, transmission, exhaust

  • The engine must not suffer from severe oil loss.
  • The oil level of the engine must be sufficient.
  • Transmission or axle drive must not display severe oil loss.
  • The cooling system must be without defects.
  • There must be sufficient coolant.
  • The amount of anti-freeze in the coolant must at least comply with the manufacturer's recommendations.
  • The exhaust must not display severe damage and functional damage.
  • The exhaust must have been properly maintained.
  • A test drive must not reveal any atypical noises from the engine, axles, transmission or automatic transmission and no other defects should be detected.

Wheels and brakes

  • The tyre tread must not be less than 3 mm.
  • The rims must not show signs of severe oxidation or damage.
  • The spare tyre must be functional, the tread depth of the tyre must be at least 2 mm.
  • The brake lining and discs must not have reached their wear limit.
  • The water content of the brake fluid must not be more than 3%.

Electrical systems

  • Control devices and instruments must not be defective in any way.
  • Electric windows must not display any defects.
  • The electric sliding sun-roof or cover must work.
  • The air-conditioning system must be fully functional and must not be defective.
  • Electric seats and seat heating must be in perfect working order.

Proof of obligatory inspections and customer service

  • The main inspection sticker must still be valid for at least 21 months.
  • Cars with computer controlled catalytic converter or diesel-powered vehicles must have an exhaust emissions analysis sticker that is still valid for at least 21 months
  • For cars without catalytic converter or with an open-loop catalytic converter, the exhaust emissions analysis sticker must be still valid for at least 9 months.
  • For classic cars the following applies: Petrol-driven cars first registered before 1st July 1969 and diesel-driven vehicles first registered before 1st January 1977 are exempt from the exhaust emissions analysis stipulation.
  • For taxis and hire cars the following applies: The main inspection and exhaust emissions analysis stickers must still be valid for at least 9 months.
  • Regular customer services as recommended by the manufacturer are included in the test for the DEKRA Seal for pre-owned vehicles.


* Source:, retrieved on 12/01/2014