Hello, next week I have flight from Colombo to Frankfurt via Mumbai with Vistara. I have 18 hours layover in Mumbai. Whole trip is on one ticket.

I don’t want to leave the transit area, and would like to use transit hotel. I don’t plan to apply for visa

1.) I want my luggage to be transferred from Colombo all the way to Frankfurt as I don’t plan to get visa. Should be possible?

2.) Do I actually need visa? I guess not right?

3.) Is the hotel in transit area open?

Thank you