Excerpt:
Corporate Logo
Basically, the Varta corporate logo consists of three elements: the logograph itself, the brand name and the slogan. The layout , the colours and the particular proportions are binding and must not be altered.

The corporate logo is always horizontally aligned. The logo is always positioned to the left of the brand name and the logo and brand name are always of the same height.
Our slogan, “The Battery Experts”, is binding and is always positioned below the brand name and logo. The only variation permitted without our slogan is the variation for the corporate logo in portrait format (see section 2.3.2 “Portrait format“). This version may only be used in excptional cases and must be approved by the CD Team.
You may use the negative corporate logos only on dark backgrounds.
The slogan is only permissible in the German and English language versions. In publications appearing only in German-speaking countries, the German version is always used as a matter of principle, while the English version is always employed in all other countries. The English version is used on products, as these are marketed on an international basis. (…)

Source:
> Varta - General Manual - Corporate Design [PDF]