Visiting Hanover Germany, suggestions?

Later this month I’ll be taking a business trip to Hanover Germany. Anyone live near there? Recommend places to visit? I’ll have a free weekend and potentially a few week nights free.

I already checked on the Nürburgring and looks like no chance of getting on track. There is a race or two over the weekend so I may go watch. Is there anything decent for spectators at that track?

I’m open to suggestions.

Wolfsburg is very near to Hannover, there is a nice car museum there. (Volkswagen).

Nurburgring is quite far away. You pass Stuttgart, which has the Mercedes and Porsche museum…