Einszett Cockpit Premium is the best product for the interior.

http://www.detailersdomain.com/1zein...itpremium.aspx

Leaves behind a nice matte finish, restores moisture into the vinyls, and has a very mild citrus scent.

After discovering this product I will never use anything else.

For the leather, use Zaino Leather in a Bottle:

http://www.zainostore.com/Merchant2/...oduct_Count=13

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12 X5 M - 06 X5 4.8iS - 03 X5 4.4i - 03 M5 - 02 X5 4.6is - 99 M3 Dinan S3 - 98 M3 - 92 850i-6 - 92 850i - 91 325ix - 89 M3 2.5 - and a few parts cars