MBDOC or anyone else:

Is this canister a maintainence item or is a life-of-the-car type part? Also, would it be possible to simply disconnect the canister hose that leads to the throttle valve body to then check to see if my on-off ratio readings stabilize, or would this affect chamber pressure and make matters worse?

Also, if you have a p/n for this charcoal filter I would appreciate it!

Thanks again!

__________________
-Paul-
'01 E430, Sport 72,000 mi
'98 C280, 126,500 mi