The two of them are already mentioned in the title. At the Audi (only Avant) both available diesel engines are in question and at the Mercedes (only Limo) of the 200, 220 and possibly also the 270CDI are in question. At the moment my tendency is towards Mercedes because of a steering chain and the avoidable longer running time. However, the rust reports in the W 203 pre-MOPF generation scare me a bit off. I find the 1.9TDI somehow e twas undermotorized, just like the 200CDI with 116hp. On the other hand, the 2.5TDI and the 270CDI will probably cost me too much in the tax. I would be very happy about a few (experience) reports!