without having 'actual information' I would say that wherever you bought these shock absorbers from could tell you that...it's actually probably on the installation pamphlet, although I could see that it might say 'See Your Models Owner Manual' for detail... and yeah...Mercedes (at least mine) has what they call a 'Modified McPhearson Strut'. The strut (shock) is mounted to bay/fender directly, ala conventional strut but the spring is external to the strut..it's a strut without a spring....