Thanks. I'm starting to abandon the idea of going straight to the 722.6 and may use a 722.3 with first gear start for the time being. Not as nice of a setup but I'm a big proponent of never letting the car get too far from being operational at any point. This isn't my only project and I don't mind if it takes me a while as long as its not sitting on jackstands for too much of that time.
As far as piecing it together goes there are plenty of m104 cars in junkyards. I am sure that over the next few months I can find all the accessories and wiring bits I need.
The reason the chip key is an issue is I'd have to find a car with the key to pull that from. Otherwise I'll have to deal with reprogramming the key. If I had the time and space to go buy a running M104 car with first gear start I could pull those parts from it but then I'd have to deal with a husk of a car that isn't going to be worth anything when I'm done with it. Its not like I'd want the engine or trans from any $800 parts car I find either. It seems like a lot of hassle for a handful of parts I will eventually phase out. I've done that with 2 ratty R107s at this point for bumpers and stuff and its almost not worth the hassle.
Correct me if I'm wrong but couldn't I just pull the ecu and related modules, harness, accessories, and flywheel from a junkyard non asr m104 C280 or E320? Then I can pick up a known good and low mile 722.3xx with first gear start from a 4 cyl and be on my way to doing the various fab tasks I need?
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