so its come to my attention that the motor mounts on my 94 e420 are shot. which explains some things. My question is, whats it like to change motor mounts. is this a DIY? if so what tools do I need? or is this a strictly a "take it to the shop" kinda thing? I've never done motor mounts on any car before, and I am just envisioning it as a ridiculously hard thing to do.