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newbie here, need to replace spark plugs and air filter, never did this job on my a4 before...any help on how-to? i cant quite reach the bottom screws on the heatshield to get it loose...and any good brand of Hp plugs?
 

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Bosch plugs are about the best. You'll notice that they are very stiff to come out, beware of snapping them off if they get too tight. Do not allow any crap to fall down the access tubes during the replacement process else it will finish up in the combustion chamber. When replacing use Champion spark plug lubricant (graphite) to reinstall.
 
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