This is a 1995 Sl500. I did not see any hoses going in or going out of it. I assumed this had to be some kind of a gearbox. The steering wheel shaft goes into it. I would be inclined to use a stop leak additive but is it going to be compatible with whatever MB fluid is in this reservoir for the power steering pump? This fluid is clear looking. Thanks and any thoughts, suggestions on this are welcome. Steve