I agree with the general sentiment of just bypassing this device, and run the fuel hose directly to the prefilter --> lift pump. I have the exact car you do, and I've bypassed this on my car, and on two previous 190D's without issue. I'm also tempted to bypass the redesigned version on the om606 engine. Really not needed if you live in location with a more temperate climate. Also, this gives you an opportunity to really clean up and reroute the fuel and coolant hosing in that area to make it look much more streamlined.