
None of mine obviously ask to go out, and I prefer they don't as I don't want them training me by barking at the door every time they have a whim to go out.
The most I get is being stared at or standing near the door quietly, but mostly they get sent out to go fairly frequently and in good weather the door stays open, unless they are barky.
You just need to take him out when he is likely to need to go or starts sniffing looking fro a place.
He won't have full voluntary bladder control until he is about 5 months, poos are usually quicker.
Dachs owners have told me that as a breed they can be harder to housetrain than many breeds.