hi guy's.....first time poster here......i got a '98 626 with the check engine light on....the code is p0400...egr problem....can't find the valve...i got a manuel from the library for the car..but, it was not too clear on the process of replacing or cleaning....do i have to take off the intake manifold?.....if so, what kind of pain in the rear is it?...also, what else need's to be removed?....would i better off taking it to a mechanic?....other car's that i owned had the valve right on the side...easy to get too.....not this one.....the car has 87,000 miles on it.....i do alot of short distance driving as well.....like 1 mile a day....thank's for any help you can give