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Discussion Starter #1
Ok, so I'm in the process of pulling a set of front Recaros from a recent purchase to put into another 164. Pulled the passenger side seat, and there exists a PVC "capsule" of sorts wired into the seat controls. Its about 4-5" long, made with 2" +/- PVC. Both pass and driver's side seats have the device. Both are labeled (in Sharpie) "Pass Side Only" and "Driver's Side Only".

The pass. seat worked properly in all adjustment directions, and the motors sound healthy. The capsule has 5 total wires going in/out. Wire color and function, per the wiring diagrams, are as follows:
Red - Spliced into Red - Hot all times
Black - Spliced into ground - Ground
Light Blue 1 - Spliced into Green wire side of wire #1 to longitudinal seat adjustment motor.
Light Blue 2 - Spliced into light blue wire side of wire #1 to longitudinal seat adjustment motor.
**Green and light blue would connect together at plug without this modification.
Purple - Spliced into wire #2 (purple and black) to longitudinal seat adjustment motor.

While it looks like a kludge, someone put some effort and thought into this - the capsule is sealed up nice and tight, and original-type wiring connectors were used to splice it into the original wiring.

Any ideas on what it might be accomplishing? Any idea what I might find inside if I decide to break one open? My initial thought is that this was either a home-made attempt at the seat motor modification box (blue box) or maybe the dealer version of the blue box for the Recaro seats that were just a little different from the stock S seats? Whatever it does, it's only tied into the longitudinal seat adjustment motor circuit.

Last pic is of a Recaro seat bottom in what I believe to be original configuration.

Any insight appreciated...
 

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Mine is the same. I believe it may be part of the system that lets the seat remember setting for three people and go to each on the press of a button. Just tuck it under the seat and move on.
 

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I think that for some cars, there was a mod which gave the seat adjustment a little kick to get it off the end of travel. Evidently some seats were getting stuck at the end of travel. This looks like maybe a homemade version?
 

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No, it's not a substitute for a Blue Box. The Recaro seats are completely different from the base, S or LS seats. At first I thought it was for the lumbar control, but the passenger side has lumbar support too and doesn't have that thing.
 

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I'll buy that. Makes it more interesting.
 

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Discussion Starter #6
The pics are from the passenger side seat. Both seats have the capsule. Only the driver's seat has the seat memory switch. Driver's seat also has the large Hella seat memory module under the seat (looks like an ECU) that controls the memory functions...

Glad to hear that at least one other car has this...
 

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I don't think I could stand it, not knowing, just because I'm curious. I'd have to carefully open one up to take a peek. Maybe it's resisters to reduce the power slightly to reduce loads on the seat gear works, as some do with the 91-93 hvac stepper gears.
 

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Discussion Starter #9
They look like pipe bombs.
That was my first thought! I backed away for a second... I don't yet have those steel plates installed under the seats, like Bobby D in "Casino". PO was a perfect gentleman, BTW.

I haven't pulled the driver's seat yet. I may do that tomorrow. Driver's seat works 90% of the time perfectly, but occasionally and sporadically will not slide back/forward. Continued trying to go back/forward will result in multiple bumps forward by the seat motor until the seat is up close to the dash...then it will start to work again. I'll open up the driver's side capsule to see what's going on. My hunch is that this thing does work to back the longitudinal adjustment off just a hair, after stopping movement, like the blue box does. But doesn't the blue box do that for all of the motors? Not just the forward/backward sliding motor?
 

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Very interesting, as I have only the one on the driver's side. Mine too has the hand written labeling, although it does say something like "Driver's Side Only".

Not having one on the passenger's side hasn't seemed to affect anything. That seat works fine in all directions. My driver's seat seems to have something stuck in the gears that make the back of the seat move up and down. The motor is willing but the system is stuck. I haven't felt brave enough to tear it down to find the problem. Fortunately it is stuck all the way down, which is where I want it to be.
 

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