I'm trying to use this forum to learn all I can about fixing up the 300D. So far it's gone well. Right now I'm trying to get things running smoother and I'm trying to go through the common procedures. The only thing is, I'm a bit nervous about trying to do a valve adjustment myself. It seems like you need the right tools and it has to be done very precisely. I have a highly recommended Mercedes place here in town that will do it for $140. Think spending the money is worthwhile for a rookie like me who might take 5 hours to do it, swearing and cursing and possibly screwing it up?