The current ETA in my car is date stamped April 1993. It has the early pancake connector.

I have a spare ETA on the shelf as well. I cannot remember where I got it. I thought I got it from ebay some years ago, but I cannot find any emails/receipts pertaining to it, so maybe I took it off a junkyard car at some point. I'm losing track
...... Here is my spare, date coded August 2002.

I vaguely remember testing it when I got it through some shade-tree-mechanic-method that I *think* I heard about from @JC220. I vaguely remember disconnecting my car's ETA, setting this harvested ETA on top of the MAF and plugging it into the car and make sure that the throttle opened and closed correctly while the car was sitting in the garage in Park.
Anyways, I *think* (maybe someone can correct me) I read somewhere that the pancake ETAs are less prone to eco-junk wiring failures than later cylindrical-connector ETAs. That said, I *think* also read that the pancake ETAs still have components inside / doohickeys / little-green-men that wear out over time and need servicing. So my questions are:
1) Should I send my spare to Don Roden for rebuilding? I would anticipate that my original ETA would fail at some point and at that time I would swap in my spare and then send my original out to Don for rebuilding too, assuming Don is still in business at that point.
2) If I flex the cable on my spare ETA, I can hear crunching. Does this mean eco junk wiring is inside even though I vaguely remember Victor @ RestoreYourMercedes saying something about pancake ETAs not having such wiring?
Thanks.

I have a spare ETA on the shelf as well. I cannot remember where I got it. I thought I got it from ebay some years ago, but I cannot find any emails/receipts pertaining to it, so maybe I took it off a junkyard car at some point. I'm losing track









I vaguely remember testing it when I got it through some shade-tree-mechanic-method that I *think* I heard about from @JC220. I vaguely remember disconnecting my car's ETA, setting this harvested ETA on top of the MAF and plugging it into the car and make sure that the throttle opened and closed correctly while the car was sitting in the garage in Park.
Anyways, I *think* (maybe someone can correct me) I read somewhere that the pancake ETAs are less prone to eco-junk wiring failures than later cylindrical-connector ETAs. That said, I *think* also read that the pancake ETAs still have components inside / doohickeys / little-green-men that wear out over time and need servicing. So my questions are:
1) Should I send my spare to Don Roden for rebuilding? I would anticipate that my original ETA would fail at some point and at that time I would swap in my spare and then send my original out to Don for rebuilding too, assuming Don is still in business at that point.

2) If I flex the cable on my spare ETA, I can hear crunching. Does this mean eco junk wiring is inside even though I vaguely remember Victor @ RestoreYourMercedes saying something about pancake ETAs not having such wiring?
Thanks.