The cap/wrench for the 128i is the same as the one on my S80 V8. I bought one off ebay for about $7. The crappy door on the bottom is a lot better than a dozen screws on the bottom of the S80. I may cut out a piece of the shield after I figure out how I will hinge it back on.
I have the Stahlbus drain valve on the BMW and Volvo. It takes forever to drain but that's a small price for being clean.
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'08 128i 6M
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