Should have stuck with your 2.2 TiD Jim! I cleaned the EGR on mine not long after I bought it at 81k miles, always use branded diesel, a bottle of Forte at every service (despite what a certain Job's comforter on here says additives do work - my old Astra G is testament to that - cut out one day as I was half way out of mt drive, AA man gave me a horror story about injector seals, leak off pipes and vacuum hoses - a bottle of Wynn's EGR cleaner and Fuel treatment and it has never gone so well!).
The 9-5 is now on 184k miles, heven't cleaned the EGR again, the only worry is an advisory on rear inner wing corrosion near the seat belt mounting. Looks like the old girl is heading for the scrapyard in a year's time!