Very Good,

Do post whatever you finally find..

The car has the updated relay. I took it out and tapped it this morning. That seems to have fixed the light on/key off. I'm still getting 17 flashes on the diag plug. I'll tinker more today and post an update later.

Todd

That is a good indication that the contacts are bad in th OVP..they are sometimes sticking closed , which also would mean they are sometimes not conducting, which would bring up that communication code you have.
Might just want to clean the contacts, but I would just buy a new one .
You are a Radioguy, so take the top off and have a peek..

My 1989 300Ce does this occassionaly as well.

I haven't even tried to figure it out.....

__________________
1989 300ce 129k
( facelifted front,updated tail lights, lowered suspension,bilstein sports, lorinser front spoiler, MOMO steering wheel, remus exhaust,stainless steel brake lines). (Gone)

1997 s320 154k (what a ride). Sold with 179k miles. Replaced with Hyundai Equus

1994 e320 Cabriolet 108k



1972 280se 4.5 153k Owned for 12 yrs, sorry I sold it


[/SIGPIC]

Not as big a deal on yours ..but he has HFM/SFI full electric Engine Management, so a bad OVP will raise hell with all systems,

What is OVP? My CHECK ENGINE LIGHT is starting to come on (quivering) when the ignition is off (no key), but turns off when the car is started. It runs fine, and does not hesitate. Any input would be appreciated.

__________________
- 2006 C230WZ Sport sedan, 6 speed, Black/Charcoal
- 2003 S500V4 Sport, Black/Charcoal
- 2002 E320 4Matic, Wedgewood Blue
- 1995 C220, Emerald Green, 95K miles
- 1991 300CE, Smoke Silver, 79K miles
- 1989 300E, Black Pearl / Grey, 136K miles *** STOLEN 3/2012 ***
- 2001 Corvette, Torch Red, 18K miles