I went and looked at this wagon a few weeks ago briefly and it starts and runs but will not rev up past about 2k, sometimes only about 1500 rpm. I went back ago picked it up today and hauled it home. Only after I got it home and started looking closer it discovered it was actually a 4matic. Anyway car will start and run and will sometimes idle fairly smooth but for the most part idles rough and it will not rev up. I pulled the codes and get P1580 actuator (M33). When I look up M33 in star finder it say its the air pump at the front of the engine. This makes no sense, I think Im looking it up wrong or something. Anyway, what actuator are they talking about? The deal by the brake booster that connects to the pedal cable or something else? Will this cause it to run like crap? I also get a P1187 safety fuel shutoff. After looking closer at car its actually fairly nice with only 170k miles on it.