Opinion? It could be something as simple as when you have the car on an angle, condensed water in the exhaust system, collected at some low point, is now able to flow somewhere it does not usually go or live, so to speak.

I can't tell you how many times I have followed cars away from stop lights, etc. with water almost pouring out their exhaust. It's condensation. Typically from cars which I suspect are driven a lot of stop and go without extended high speed operation to evaporate out the condensate.

I can even remember putting a new, stock exhaust on my old BMW 5 series, and water came dripping out even the first time I started it up!

Anyway, I hope it is something this simple for you. Let us know if you pin it down.

Rgds,
Chris W.
'95 E300D, 327K
'88 300D, 167K

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