Hi,
On the Seafoam's website they recommend using intake manifold, pcv valve or break booster line. Well since Dpetyk said MB's intake manifold has the "running up hill" design I'll try Dpetyk's method. I recently cleaned my throttle body and I could see some of the cleaning fluid accumulated at the bottom of intake manifold when I opened the throttle plate wide opened (the 2nd plate). I am not worry about it because it will evaporate very quickly as it is very well ventilated as long as no gooy stuff is used. bottom line: recommended instruction is not as effective as Dpetyk's method due the MB's intake manifold design.

Now Dpetyk or someone could you please tell me where I can find the auxillary air lines? Thanks

Rick