It looks like their contact e-mail is [email protected]
I don't speak German either, however running the site through babelfish we get the following.

(Main Page)
It is time to sell your CD Change-over SWITCH in the auto.
Our MP3-Autoradio is perfectly new. It is miniature a computer on a Linux the operating system runs, and which can play transferred MP3 files in CD Quality.
In the device a Digital/INTEL StrongARM processor with a clock frequency from 220Mhz, with sufficient performance for MP3 decoding, and enough power reserves for future applications or extensions runs.
It has 8Mb RAM memory, and a Flash ROM for the initialisation program.
Up to two 2,5 " Notebook fixed disks can be built into the impact-protected framework: with the at present available capacities from it 28GB storage space result. At one spieldauer of 17 hours per GB this storage space is enough out for 476 hours music in absolute CD Quality. Can your CD Change-over SWITCH keep up there?

A special DSP built in the audio section (digital sound processor) with a D/A transducer enables the adjustment of bass, heights, balance and Fader for the 4 outputs. For each of the four outputs a 5b-and Equalizer is available.

The decoding of the stored MPEG files takes place via software. This software can decode MPEG 1-Layer 3 and MPEG 2 compression. Future standards can be decoded by supplement of the software likewise. This guarantees that your device remains also in the future on the newest status.

At the front of the device is a diagram fluorescence display. This display serves among other things for paging through the menus and shows the titles to be played.
At the rear side a serial interface (230.400bps max.) is, the USB port (12Mbit), the plug of the external current supply for at home, the audio sockets to the link to the domestic stereoanlage and the Docking plug for the card frame in the auto.
How do your favourite titles come into your car radio?
They pull the device from the Docking station in the vehicle and attach the MP3-Autoradio over the USB port or the serial interface to the PC. With the provided PC software you can copy within a short time MP3-Dateien from the PC into empeg the car radio. They can arrange " Play lists " and much more besides.
Besides you can receive radio endings with the MP3-Autoradio naturally also still. A RDS recipient is with inserted. In the display you see insertions to the sender names and radio text.
With the infrared remote maintenance belongs to the basic equipment.

(On their order page...)

Configuration: Car radio MP3 Player, with 4 GB fixed disk - sufficient for approx. 70 hours of music, Quick change picture frame for fast removing of the device, external power pack, PC software for Windows. Note: the device does not possess inserted power amplifiers!
Most important advantages
play and a recording of MP3 files
RDS radio with radio text and display of the sender name
also at home connectable to the stereoanlage
in the final development up to 476 hours of music storable

Prices (inclusive 16% MwSt. and forwarding expenses)
Description Art. NR. Price
MP3 car radio, 4 GB Art. NR. 1000 2,750. - DM
second disk, 4.0GB Art. NR. 1002 680. - DM

(A form is displayed here)
Form for the request of further information Make your choice, and you indicate to us, how we can achieve you.
Transmit to me additional documentation over the MP3 car radio
I would like to order. Please you transmit the order papers to me.

To the delivery situation: At present (at the end of October) the manufacturer about 12,000 orders are present. Delivered of it become/will the first 4,000 at present. For new orderers that means that her in approximately with a delivery time of 3 to 4 months to count must. There the demand at present, can the delivery time is enormous however still extend.

Jazz
(List 112, S/N 00030, 4 gig blue)