求翻译：在发动机和变速箱方面，国产奔驰新款C级仍将提供四种动力选择，其中入门款车型为C180K，搭载1.6升机械增压四缸发动机，中间配置车型为C200CGI和C260CGI，均搭载1.8升排量涡轮增压四缸发动机，但两者的动力调校有一定区别，后者略高。最高档车型为C300，搭载M272系列3.0升V6发动机。变速箱方面，四缸车均配备5速手自一体变速箱，六缸车则搭配7速手自一体变速箱。是什么意思？

In the area of engine and gearbox, home-made Mercedes-Benz new c-level will still offers four dynamic selection, which entry model for the C180K, carrying mechanical turbocharged four-cylinder 1.6 l engine, configuration models for C200CGI and C260CGI in the middle are carrying 1.8 liter displacement turbocharged four-cylinder engine, but the dynamic adjustment of a certain difference between the two, which is slightly higher. Most upscale models C300, carrying M272 series 3-liter V6 engine. Gearbox, four-cylinder cars are equipped with 5-speed gearbox, Royal saloon, six-cylinder car is used with a 7-speed gearbox, Royal saloon.