There's a lot of elements to typically cover in these questions, clarifications, scoping, making sure you're answering the actual question the interviewer is looking for you to answer, etc. Could be worth doing a mock interview with one of the Prepfully Siemens Sales Engineer experts... they've worked in the role so they clearly know how to get through the interview. prepfully.com/practice-interviews
Bro you did a great job preparing and that shows in your feedback...don't be discouraged even when the odds are stacked against you your card has to come but you must be patient and continue to grind away. SAP is a great company and they have many opportunities available keep applying and if you know sales like I know sales then you know every NO gets you closer to the YES! I see you as a key asset to SAP in the near future!