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On some cars it is part of an optional stereo package, on some it is standard equipment. It is available on almost every car being built in 2014
I don't think it is "Standard" yet as most low priced base cars the mats are still optional.
1968
1915
Yes they do. Most are standard equipment.
By using heavy equipment.
Though there are 'standard' cars sold, when buying such luxury cars you specify what equipment and extras you want or require when you order it.
Higher end cars in the early 50's
airbags
By 1955 tubeless tires became standard equipment on new cars in the US.
on BMW ect it means standard equipment but on Audi it means special edition, not a lot of people know this
you have to use that measurement cause if you dont people cant make cars