there are two types of S-Class benz. SALOON and LONG WHEEL BASED. both have different prices.
here is the price list fo LONG WHEEL BASE
S 350 L $203,900
S 500 L $269,900
S 600 L $363,900
for the regular saloon.
S 350 $187,900
S 500 $253,900
All prices are in Australian dollars.
here is the dedicated website for S-Class Mercedes Benz.