Ahhhh okay - so you're basing the actual cruising speed on maintaining a solid engine speed? I guess with a manual and no slippage in the clutch that isn't such a bad idea!

As mine is auto that would work when locked up, but at lower speeds it would be an issue. My ECU doesn't respond to the analogue input unfortunately - so it needs the speed in on the individual wheel speed data it would seem. I was lead to believe though that it needed 'other' data - but I've yet to work out what that might be.

Need to get back to it really and test some things - I will report back :)

Haven't had a chance to look at the cruise anymore lately, but I've been working on some other bits and still using it daily :)

Short video from an afternoon of offroading a couple of weeks ago - https://youtu.be/J9zTN_6wNw4

In low range you barely need any throttle - if any at all. It just pulls at idle so nicely. The others were impressed at how well it did - and how smooth it looked following them in the 90, bouncing around. AC, comfortable seat, auto - what more do you want.

Otherwise... everything has been more or less fine. Did have an issue with it cutting out after a few hours of running during the summer - turned out to be a worn o-ring on the high pressure pump's regulator. Then had an injector fail. Or possibly the other way around I can't remember. Either way - both now sorted.

Diesel heater's coolant pump started to struggle pumping before giving up completely, so swapped another pump in and I'm back to being able to preheat in the mornings :)

The P38 is now on 171k, putting the engine on err 177k now. 9k done since the conversion 15 ish months ago and loving it.

Bit of garnish for the back end... my own design and yes its not an ///M car - but anyone that knows what an M57 is will get it :)

Looks good!

Great build !!!
I stumbled across this thread while doing some research on the DDE 4.0 ECU and the can bus. Have you made some progress on the cruise control ? Are you willing to share the code (pids) you used to feed the road speed to the ECU ? I have tried feeding a pwm wave to pin 22 (x2414) on my ecu like LiamC talked about, with no luck. So I am thinking my ecu wants the speed over can bus. I would love to get my cruise working.