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I'm not sure if only NG900's with Automatic Climate Control (ACC) have the HEPA filter, but I just checked mine (high efficiency pollen something or other) and it was disgusting. I have to wonder how I got any air into the car with this thing junked up the way it was.
I'm off to find a new filter tomorrow, but in the meantime, I urge you all to check yours. The procedure is:
1. Open hood and remove spongy rubber strip across engine compartment below windshield/screen.
2. Remove small caps on bottom of wiper arms and remove 13 mm nuts
3. Influence wper arms off (reinstall nuts and tap lightly with a metal object (not a large hammer, but something with mass).\ if they don't come off. At reassembly, make sure that the "splines" are dry and have no lubrication on them as you don't want them slipping when you need the wipers.
4. Lift off plastic shield (might be glued in place by previous owners due to Saab assigning the best morons to desgning the windshield mouldings).
5. Lift off secondary plastic shield (baffle for airflow so rain doesn't go directly into the intake vent). It might be glued too.
6. Below the wiper assembly, you'll see this disgusting mess. I can't understand why I haven't caught legionnaires disease from mine. It changed from a pollen/bacteria filter to a breeding colony. There's a clip at each end to release it from its imprisonment. Remove it with rubber gloves and make sure your neighbours don't see it.
7. Take this opportunity to lubricate the wiper linkages. Pull back the rubber covers over the wiper spindles and squirt the lubricant in. If you keep the car for many years, you'll thank yourself (buy yourself a beer in 2009).
8. Also take this opportunity to remove leaves, twigs, mice and other crap and corruption in this area. Make sure the drain hose (centre) is clear so that water can drain out of this area easily.
9. Get a new filter and slap it in. Assembly is the reverse of the above. Lube the wiper linkages. Hell, buy me a beer in 2009.
Total time for above - 1 hour if you've got the tools easily accessible (ie, not a run to the back of the house and down to the basement every time you need something).
Tools needed: 13 mm socket, patience, sharp flexible knife for the glue the previous owner used on the mouldings, lubricant for the wiper linkages.
My open questions to Saab (are you listening over there?):
1. Why is it so hard to replace this filter? It's not that hard on my furnace. Please change the design NOW. Do you want me to send you a sketch of a design that is 15 times better than yours?
2. Why is the filter so expensive? I just picked up a similar quality filter for my furnace that is 5 times the square area for $20 Cdn. Guess what I'm going to do with it...
3. Why are the moulding designers morons?
Hey guys, hope this helps (if you can get past my particular brand of humour...).
Nielsen
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