It depends. The door panel leather was an option from the dealer. If you know what genuine leather looks like and how it feels, then you should be able to distinguish. I have this option on my car and the only plastic/vinyl is the dash and the back of the driver and passenger seats.
<span style='font-size:8pt;line-height:100%'><span style='color:blue'>1998 BMW 323is Coupe, Black
18" M3 Hyper Silver Rims
2 12" Rockford Fosgate Subs; Sealed
1.0 Farad Capacitor
800 Watt 2-Way Rockford Fosgate Amplifier</span></span>