The models equipped with inline 6 petrol engines have 5-speed manual transmission as standard with either 4-speed or 5-speed automatic transmission as extra-cost options, making W140 the last S-Class to have manual transmission. In June 1996, both 4-speed and 5-speed automatic transmissions were replaced by 5-speed electronically controlled automatic transmission. The inline 6 diesel engines were never offered with manual transmissions, following the "tradition" with W116 and W126. S 300 TURBODIESEL, introduced in 1996, received the 5-speed electronically controlled automatic transmission.