Originally Posted by SLK32Germany
The first SL55 Production year 2002 had the 80mm TB without a Bypass in the IC. In 2003 they changed it to the Bypass System with a 74mm TB, mainly because of lower fuel consumption. The new SL55 07/08 with 517bhp again uses a 80mm TB.
So the question is where to find one for a reasonable price. And are we certain they are measuring id? Internet info can be uncertain sometime.