How can it be explained that two people with the same IQ receive different scores on an exam? Is it intelligence? Personality? Can thinking styles, located at the interface between intelligence and personality, make important contributions? For Robert Sternberg, thinking styles are not an ability, but rather the way in which one wants to use one's abilities. Sternberg developed the model of self-government with 13 thinking styles, which can all be measured by the Thinking Style Inventory (TSI). Each thinking style stands for a unique way to deal with problems and tasks. To investigate a possible relationship between thinking styles and intelligence, data were collected from 164 students. For this purpose the German version of the TSI and the Intelligence-Structure-Test 2000 R (I-S-T 2000 R) were applied. To take effects of age and gender into account, the relationship between thinking styles and aspects of intelligence, measured by the I-S-T 2000 R was calculated by using partial correlation. Due to the large number of correlations, the Bonferroni-Holm correction was applied. No significant correlations could be found. At least differences in sex and age were found. Men achieved significantly higher scores on the legislative, judicative, global and liberal thinking styles than women. Also a correlation between memory and age was found. Like in previous studies no convincing correlations between thinking styles and intelligence were found. This study was a first attempt to examine the German version of the TSI in conjunction with intelligence. Although no significant correlations were found, some of the hypothesis were expected to point in the right directions.