There shouldn't be a "need" to update any software, it's not normal maintenance unless you have an issue related to a fix provided by the release. Also at 22k, you seem premature to do plugs and rear diff fluids. Plugs and diff oil don't go "bad" like milk in a warm fridge, or like brake fluid that absorbs water reducing its boiling temp.
08 E90M3 6MT Alpinweiss/Carbon
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Last edited by thekurgan; 01-17-2013 at 07:24 PM.
Reason: shitty speller