This is probably a ridiculous question as I believe most benz owners on this forum treat their car like their baby(some better than their baby)but I'll ask it anyway. I've got a nasty oil leak from my 87 560 sel and it appears as though the tranny might need to be moved to get to it. Seems like a big job for a non threatening problem. Just tired of messing up driveways. What are possible hazzards of a stop leak additive?