roadk,
If you're using Klasse All in One and Sealant Glaze why do you want to use a true "glaze"? The other folks are right, a traditional glaze may contain cleaners that will strip your sealant. Just layer your sealant glaze a few times if you want better protection. For black shine the Souveran wax is key. When layered over your sealant it will be spectacular. Your Jetta is an Audi/VW paintjob, one of the best in the bussiness. Follow DavidB's perfect shine; clay, cleanse, spot clean with 3M Fine Cut Rubbing Compound, use 3M Swirl Remover for dark cars, Klasse All in One, follow with Klasse Sealant Glaze (layer this if you want) and top off with Souveran Wax. That's alot of work but if you maintain the car with quick detailing a few times a week, your work will last for up to a year. I detail a clients black VR6 with clay, Meguiar's Prem Paint Cleaner, 3M Fine Cut RC, #9 swirl remover, #20 Poly Seal and a final coat of caranuba wax. The guy is one happy camper. I just Quick Detail him a few times a month and he's good to go. Let me know,
Gil