[snanceki]

Hi Sleepwalker. Thanks for info.
Haven't been able to do scope check yet. No scope. Don't suppose you know of any software to make a PC / Palm into a scope?
Have confirmed that it is the CAN that is the issue rather than the door switches. Pulled pins 8 & 9 on A34 individually and together. problem remains with either connected. However Seat Convenience relay works fine so I'm confident that it is nothing to do with the door switches to ground.
Liked the idea re Bl/Gr from S60/12 to Pin 69 N10. However I don't think this will prove the solution because I already checked switch operation and disconnected X8/4. Need to pull pin 69 on N10 to be absolutely sure in case lead is to ground. Also want to pull Pin2 A1 incase the ASSYST is playing a part in this. ASSYST didn't advise a service required after 1 year. Maybe it isn't supposed to.
Can't find S88/2. Note U20 on diag states not with IH?
What do ATA(EDW), TS(AS) and IMS(IRS) mean.
I'm confused as to what each module does. My understanding is that A34 controls doors and security whilst N10 does power management (amongst other things). I assume Key Plip and Ign Sw position are controlled via N10? Am I correct?
Can't understand why if A34 and N10 work OK individually they won't work together. What messages should pass from A34 to N10, vice versa and why? Surely even if there is a CAN signal which states doors are open the fade would be overridden but not the 5 min timer...or is this an additional MB software glitch just when you want the protection of the timer!
An MB WIS wouldn't half be useful!
Is there any info on how the modules work. i.e. some form of logic tree available?
I also intend removing all inputs to A34 except the CAN and see what happens. If CAN connect on its own doesn't override fade I will then connect input incrementally and see what I can glean. If CAN connect alone causes fade to be overridden I guess A34 must have an internal fault.
Please remain patient. I will get there.
Keep the ideas coming.
Stuart