Does anyone know what the RPM window for activating the cam advance solenoid is on a M104.980 motor?

I pulled a M104.980 from a 91 300CE, dropped it in a 190E body, and am running old CIS v3 with the system so I do not have cam advance. I plan to wire in an RPM activated switch to engage the solenoid, but I would like to know what RPM range I should use?

I've come across posts saying 2000-5000 is when the advance kicks in, but nothing from an official PDF or anything. Is this the right range? Is there a better range to use?

The car doesn't feel much different from my M103 2.6, so I'm hoping adding the cam advance will pick up some mid range power.

I don't have official documents in front of me but IIRC its off at idle, on at 1200, off again at 5200.

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90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE 104.980
Milled & ported head, 10.3:1 compression
197° intake cam w/20° advancer
Tuned CIS ECU
4° ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff

I wonder if anyone recognized the loopback in your location.

Off at 5,200 sounds kind of high. My 97 SL320 ( With ME 2.0 / 2.1 ) has a " power surge " at maybe 3,600 and 4,300 RPM. One of these is going to be the dual path intake switching. Someday I'll add a few lights to monitor.

The timing is retarded at idle to promote a smoothness, that is why it is off / on / off. Since you are running CIS, maybe leave it advanced at idle to X RPM for a bit more low end zip.

Hey John5788, Did the RPM switch work?
Im also doing this swap and would greatly appreciate and information about the wiring of the swap

According to the FSM the .98 is 1000-5000 while the .99 is 1000-4800. In my experience the actual idle switch is 12-1400RPM. Not that it truly matters.

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1993 190E 2.6 Sportline