Scanner for Mercedes Specific Codes

[treiberg]

I know there are quite a few threads out there on diagnostic scanners. But I cannot seem to find a conclusive answer on my question. What is the lowest cost scanner or code reader that can read the Mercedes specific diagnostic codes? My cheap OBDII reader can do just fine with the generic codes, but I am not seeing the Mercedes-specific codes that I know are there (my code reader gives me P0200 on my 1997 E300D, but I am pretty sure that there is a P1975 code lurking in there that I cannot see, based on information from a scan that was done at the dealership). I know Mercedes has their $10K+ diagnostic Star system, but what is the lowest cost unit for us DIY's to get these codes? How about the SnapOn MT2500..can it do it? It is pretty reasonably priced.