The index represents a measure of the car panel evolution. Its base value of 1,000 wat set at the creation of the panel and evolves according to the evolution of the prices of the vehicles that make up its panel.
![photo Mercedes 190 SL [W121]](http://www.classictrends.eu/img/auto/27.jpg)
Mercedes 190 SL [W121] (1954 - 1963) ↓ ![photo Mercedes 300 SL [W198]](http://www.classictrends.eu/img/auto/473.jpg)
Mercedes 300 SL [W198] (1955 - 1963) ![photo Mercedes Pagode SL [W113]](http://www.classictrends.eu/img/auto/28.jpg)
Mercedes Pagode SL [W113] (1963 - 1970) ↓ ![photo Mercedes SL [R107]](http://www.classictrends.eu/img/auto/29.jpg)
Mercedes SL [R107] (1971 - 1989) ↑ ![photo Mercedes SL [R129]](http://www.classictrends.eu/img/auto/30.jpg)
Mercedes SL [R129] (1989 - 2001) ↑ ![photo Mercedes SL [R230]](http://www.classictrends.eu/img/auto/31.jpg)
Mercedes SL [R230] (2001 - 2013) ↓ 