I'm curious of the mileage on the Z3? Needing an alignment explains your tire problem. I drive my BMW's until 400k without major issues haha. But it helps I do all my own maintenance.
Unfortunately I don't know what year they began making them there but I can assure you they are made in China. This is the reason Adams doesn't carry them anymore.
The only excuse I can think of for using an expensive "high end" wax would be to make a customer feel that little bit extra special knowing they have a product on their car that isn't $10 off the...
Keep in mind brand new leather usually appear gray and not a deep black. The reason the steering wheel is a deep shiny black is because it's full of oils and dirt.