In 09 models, the EGR is detachable and does not require manifold removal (real pain as the exhaust has to go first then intake). I don’t have too much experience with this one but the main thing is that it needs a proper cleaning not just spraying with carb cleaner.
More importantly, you have to check whether it’s the EGR that’s causing problems. Did you check fault codes? Frozen EGR is usually shown as EML light on.