"Backrest adjustment" refers to the ability to change or modify the angle or position of the backrest of a chair or seat to provide comfort and support to the user's back while sitting. Full definition
20 - inch BMW M double - spoke light - alloy wheels Integral Active Steering Metallic paintwork Nappa leather upholstery Front comfort seats Active front seat ventilation Four - zone climate control air conditioning Ambient Air Rear seats with electric backrest adjustment Electric roller sunblinds to rear side windows (motoring.com.au)
Available as an option are Sport seats Plus in leather with electric backrest adjustment as well as mechanical height and fore / aft adjustment. (porsche.com)
As a feature, the lightweight seats are desirable to some enthusiast although the lack of backrest adjustment is off - putting to others. (astonmartins.com)