Known as the 'pagoda roof' SL, the W113 featured a removable hardtop with a unique roofline that was lower in the middle than on the sides. Introduced in 1967, the 280SL was the third iteration of the W113, following the 230SL and 250SL. The new number denoted the car's 2.8-liter straight six, SOHC engine, which produced 168 horsepower and 177 lb ft of torque. The W113 was quiet a bit more mild-mannered than the 300SL that preceded it, but the new cars independent rear suspension was an improvement upon the swing-axle suspension.