Can someone remind me of the trick to test which of my glow plugs is tripping up the P0380 code and causing my check engine and glow plug light to come on? I think it's a continuity test with some relay, but I can't remember. I replaced all six plugs about 25k miles ago, and I'm pretty annoyed to see this light on the dash again this quickly. I guess I've got a weekend project coming up -- nothing is so much fun as pulling that intake manifold off...

'98 W210 Turbodiesel.

Cheers, John

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'98 E300TD (W210) | Sold 6/09 with 205k and counting
'04 VW Touareg V10TDI