If something happens with you faster than 130km/h on the autobahn you're not automatically covered by insurance. You won't lose insurance, you're just only fully insured when you stay under 130. Above you make unnecessary risks and the insurance company won't cover that, if speeding is the cause of the accident.

I asked chatgpt and it is a bit different than what I thought. It came with this answer:

You are not automatically uninsured if you drive faster than 130 km/h. However:

If you're involved in an accident while exceeding 130 km/h, you may be held partially liable (Mitverschulden) — even if the accident was mostly the other party’s fault.

This can reduce your insurance payout.

Your insurer might reduce compensation if speeding is found to have contributed to the severity of the accident, even indirectly.