Haha, very funny,.

If you don't shorten the springs and use stock springs you'll never will get them back without a spring tensioner.

The Crossfire front springs are not Mercedes springs. They were designed for the Crossfire. They have no MB part number. Part number is A 193 321 0003
In europe there is a manufacturer called SPIDAN that is offering an after market front stock spring for the N/A.

Original Fahrwerksfedern - benötige eure Mithilfe - Coupé & Roadster - Chrysler-Crossfire-Forum - Das Forum für Crossfirefans

Regards
Markus