Well I've finally had a bit of "free" time to work on this door lock foolishness... still no resolution yet. I found by tearing the driver's side door apart that I would have to drill out some rivets to get to the locking mechanism and I didn't have the new rivets nor the time to deal with it as this is my daily driver.

I did, however discover that the pneumatic mechanism is hissing at the driver's door when I unlock the doors via the dash mounted switch. I'm guessing that the actuator needs to be replaced, though it still has enough "oomph" to unlock and lock the door.

I found a diagnostic in the Star manual that told to check the control module voltages for each door. Unfortunately I have no idea where these modules are located, so if any has a clue...

Thanks much!

-l-

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'84 300d turbodiesel (83K miles)
'96 300d (226K miles)
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other fine diesels...
'99 Polaris diesel (Fuji Heavy Industries single)
'01 Diesel Trail gator (Yanmar triple)
'95 John Deere 970 (Yanmar quad)
'11 BMW 335d
'12 VW Jetta TDI

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'00 BMW K1200LT
'02 BMW R1150RS

'15 BMW R1200GSA