What do you mean by mechanical life form? Silicone based instead of carbon based? Mostly made of metal? With gears and cogwheels?
It seems to me that a machine sophistcated enough to self replicate would start to look organic,...
OP here. Well, the planet has very little oxygen, for one thing. It is extremely rich in metals and salts (some of which are of an unusually high conductivity,) and the planet itself is relatively small (about the size of Earth.) The planet has one moon (also covered in a metallic "salt.") and is quite far away from it's system's suns.
Basically by mechanical I mean "looks like a robot." You know, with gears and pipes and things. To quote >>5, Silicone based instead of carbon based, Mostly made of metal, With gears and cogwheels.
Sorry if that's not specific enough. I'll try and clarify if you have any other questions.