What is a good product for cleaning the interior? I have bought the vinylex for the protection.

 

vinylex or 303 for vinyl and lexol for leather.
lexol makes vinylex and also makes a leather cleaner and a leather conditioner. you might want to get all 3...

 

Use the 303 cleaner for vinyl surfaces and lexol cleaner for leather surfaces. Use 303 protectant / vinlyex for vinyl treatment and lexol leather conditioner for the leather surfaces.

You will also read posts about products from the Leaher Institute and Leatherique. Both or very good products but more expensive