Are these drain holes???

[teahead]

Rear inner wheel well...I notice these plastic plugs.

Should they be plugged up or left open to allow water to drain???

 

[HB Chris]

They were used during the build process, perhaps for paint to drain? Common on 2002s, not sure if common on an e9.

 

[mark99]

my theory on all those odd round plugs, hold the sheet metal parts in a jig when they were welded together

 

[HB Chris]

I have only seen them in the rear wheel well.

 

[Sven]

They should remain plugged, otherwise water will get in. You could remove the plug and then spray in some cavity wax, plug and seal over the plug.

 

[mark99]

how about the holes in the floor pans?