hello i'm about to buy an mercedes c220 cdi year 2001 but the car got a problem that dont let the car pass the 3000 rpm and 130km/h. The diagnostics from mercedes is:

P1630-016 - Autorisation de conduite. le calculateur autorisation de conduite ne repond pas.

P1470-016 - Regulation de la pression de suralimentacion Ecart de regulation positif[la pression de suralimentacion es trop basse]

its in french but its easy to understand...
french mercedes say that probably is the vacum pipes need to be replaced i think!!!!
they say (in french):
"mecedes me dit que ce sont probablement les catalyseurs qui commencent Ã* se boucher "
probably the catalysts which start to be stopped

can someone give-me a clue of whats is wrong wiht the car???? and if its to expensive to repair???
thx in avanced
mario