如题，有点混乱
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sls对应的应该不是tt，而是r8

cla基于紧凑级平台的四门coupe，    奥迪宝马没有同类型车，  最接近定位的是三厢A3和2系(以后可能会有四门版)
cls定位介于大中型和豪华级之间的个性化四门coupe,同级别的有奥迪A7和四门6系(6系贵不少，车型也多。)
slk入门小跑，同级别的有奥迪TT和宝马z4(slk和z4现在都直接是硬顶敞篷，TT则是硬顶coupe和软定敞篷)
sl不知怎么形容，大一点的而且敞篷的硬顶跑车？奥迪宝马没有这级别的车。
sls超跑，同级别的有奥迪TT，宝马长时间没有真正的超跑，新的i8勉强算吧。

现在没有sla和slc，未来有sla的话会是cla的两门版。
slk是入门小跑
sl高一级
sls是超跑，可能将被便宜些的amg gy取代。
还有以前的cl现在变为s coupe，顶级豪华轿跑

一般消费者不用搞清楚
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笑了最高端应该是SL，S级平台过来，至于那款AMG超跑貌似机遇S平台出来的不太确定
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查了一下CL, 属于豪华Coupe。CL为德文Coupe Leicht(英文：Coupe Light)的缩写，既轻型Coupe。顺便普及一下，Coupe是指固定车顶的两门封闭车身结构，通常车身比同款的sedan短，通常只有一排座位，或者后排很窄小。当然现在也有四门的Coupe, 但是车身线条和比例决定了后排空间较小。

奔驰CL是基于S系列，最早称做SEC, 然后是S Coupe, 1996年改为CL。CL与S的研发是同步的，只是轴距稍短，并且共用引擎，但是只有大功率输出的引擎可选。其实目前这一代的CL要比S级重（由于缺少B柱，在车顶需要补偿）。

目前的CL级，既C216，共4个型号：CL500, CL600, CL63 AMG, CL65 AMG. CL65 AMG是最贵的，比同级别的S65 AMG和SLS都要贵，是奔驰品牌里最贵的车辆。

The Mercedes-Benz CL-Class is a line of luxury coupés produced by the German automaker Mercedes-Benz. The name CL stands for the German Coupe Leicht (English: Coupe Light).

The CL-Class is based on the S-Class fullsize luxury sedan. Known at first as the SEC and later S coupé, it was spun off into its own, current name in 1996 and in 1997 for North American markets. The CL continues to follow the same development cycle as the S, though riding on a shorter wheelbase, and sharing the same engines albeit with less choice as only the higher-output powertrains are offered. The current generation of the CL is actually heavier than the S (considering equivalent trims, due to the roof engineering required to compensate for the lack of a central B-pillar).[1]

The present generation of the CL-Class, C216, is currently available in four models: CL 500 (CL 550 in some markets, with standard 4MATIC in Canada and the USA), CL 600, CL 63 AMG and CL 65 AMG. The CL 65 AMG is the most powerful model of the CL and the most expensive Mercedes-branded vehicle, slightly edging out its S-Class equivalent S65 AMG and the SLS.[2] CL sales are the third-lowest of Mercedes-Benz in North America with under 1400 units sold in 2006, as only the G-Class four-wheel drive and two-seat SLS AMG sell smaller numbers; annual CL sales equal Ford truck sales for one day. However, this degree of distinction is considered attractive to CL buyers.[1][3]

对不起，搞错了，是CL, CLA, CLS; SL, SLK, SLS AMG.

    A-Class – Hatchback
    B-Class – Multi Purpose Vehicle (MPV)
    C-Class – Saloon, Estate & Coupé
    CL-Class – Luxury Coupé
    CLA-Class – 4 Door Coupé
    CLS-Class – 4 Door Coupé and Estate
    E-Class – Saloon, Estate, Coupé and Cabriolet
    G-Class – Sports Utility Vehicle (SUV)
    GL-Class – Sports Utility Vehicle (SUV)
    GLA-Class – Sports Utility Vehicle (SUV)
    GLB-Class – Sports Utility Vehicle (SUV)
    GLK-Class – Sports Utility Vehicle (SUV)
    M-Class – Sports Utility Vehicle (SUV)
    R-Class – Multi Purpose Vehicle (MPV)
    S-Class – Luxury Sedan
    SL-Class – Roadster
    SLK-Class – Roadster
    SLS AMG – Coupé and Roadster
    Viano – Multi Purpose Vehicle (MPV)
    Citan – Mini MPV

只有SL，SLK，SLS吧。

SL是双座GT跑车。

SLK是小跑。

SLS是超跑。