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  Switzerland

+41 (0)44 562 49 82


 Germany

+49 (0)351 897 339 510

Email us at customer-care@w-4.com or complete the form below. 

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Call us


  Switzerland

+41 (0)44 562 49 82


 Germany

+49 (0)351 897 339 510

Email us at customer-care@w-4.com or complete the form below. 

Click submit when you're done.

You can upload up to 5 files, each with a maximum size of 10 MB.
I agree to the storage and processing of my personal data by W4 for the purpose of handling my request.