Any Mercedes parts for our cars will match the R170 chassis which came on the 2001-2004 SLK320 w/ engine type M112.947 V6 for N/A & 2001-2004 SLK32 AMG w/ engine type M112.960 for SRT6. After M/B ceased production of the R170 in 2004, the spares they had left over are what went into our Crossfires. So when searching for M/B parts that are compatable with our cars, always look for 2004 SLK320 parts for N/A and 2004 SLK32 AMG parts for SRT6.
The one I showed fits all models of the Crossfires. It's the only one that should go on our cars. Other members have had issues with off brand aftermarket CPS that would fail or not even work, but the specific Bosch one works every time.

In short, most any part in your '06 Roaster will match that of the '04 SLK320, unless it is Chrysler specific!

FYI - You can also search the M/B forum for answers in the W202 C-Class section which is what the R170 is based on.