I hiaghly recommend Neventum services, I have worked with them a couple of times and they have the capacity to adapt their proposals to the needs you have for each event.
Erberich offers services for stand construction and design in Germany. Services include: individual and group stands, customized stands, furniture such as chairs, tables, couches, etc. Some of Erberich`s personnel responsible for stand construction include architects, engineers, designers, graphic designers, decorators, painters, etc. We work for our customer in a 5,000 sq. meter head office from the first contact till the stand is ready, for any exhibition.