M57 has them on the E70 in the US. Australia E53... can't say for sure but probably. They do their job so you need to keep them. The O rings leak and make a mess, but that's the nature of the beast.

Coking from oil deposits is very light at least on mine. I had a MB E320 CDI and the intake was literally full and clogged. So there is no strain on the swirl flaps so you should be ok for a long time.