Processing and tracking

So that we can process your queries specifically and quickly, it would be helpful if you could provide as much of the following information as possible:

  • Series number

  • GSP item number (e.g. V123456 or V-123456)

  • Device type

  • Fault description

  • Delivery address

  • Invoice address

  • Contact

  • Potential preferred date for returns

For complaints

Fax: +49 (0) 30 76 99 29 -395
E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

The PDF Repair-Form is a practical form that can be easily completed on screen and send directly to us as an e-mail or can be printed cleanly and attached to your returned goods.

Here you can fill out the Repair-Form directly.

Details of the defective device

Device name *
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GSP article number *
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Serial number *
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Carriage type / location
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Contact details of the responsible technician

Please let us know your name.

Please let us know your name.

Please let us know your email address.

Description of the fault

Error description *
Bitte geben Sie eine Fehlerbeschreibung ein.

Is the fault reproducible?
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Do certain conditions have to be in place for the fault to appear?
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Please provide some facts of the treatment, activities or changes that have been made before the error occurred.
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Does the fault occur when the device is installed in another vehicle?
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Does the device malfunction sporadically?
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Other comments
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UPS tracking


This form ony tracks GSP shipments handled by UPS.


Newsletter for passenger information

Learn more about current product developments and projects.