The new, Pagoda Roof SL’s began with the 230SL. All of the later six cylinder SL’s, the 230, 250 and 280 are very similar in appearance. Under the skin, there were a few differences. The 230SL like all of the Pagoda Roof cars, was fitted with a fuel injected 6 cylinder engine. These early engines carried a four main bearing crankshaft and were fitted with disc brakes on the front only. Later on the 250 and 280 models, four wheel discs were standard as was a new, smoother running, seven main bearing engine. These later cars are commonly found fully equipped with automatic transmissions, power steering and air conditioning.