I checked the OVP and the fuses were good. My dealer had a relay in stock so I changed it (BTW they're over $20 less in the Mercedes Store on this site, but I couldn't wait this time) The tach works again and the ASD light is off, so I'm sure that was the problem. I can't imagine it had anything to do with the pot hole, but who knows?? I'm still getting intermittent misses at idle. After the glow (or extended glow) it idles fine for 30 seconds or so, then it starts to puff and gets continually worse until I start off. When the car is warm, it goes away. It could be a leaky injector, but I put new injectors in 2 years ago and it's been running perfect. I'm going to change filters and give it 2 hits of diesel treat to see if it clears up. The wheel and suspension are fine, which amazed me because it was such a hard hit. When the weather warms up, I'll get a 4 wheel alignment.

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Reid
Past ('59 220Sb, 2-'59 190's, '92 300D 2.5T)
Current
'04 E320 4Matic Wagon
'00 E320 4Matic Wagon