I think that an '85 would have plain K-Jet rather than KE-Jet injection. So enrichment is controlled by the warm-up regulator, not the actuator controlled by the computer with input from a coolant temp sensor.

Again, I think that your only temp sensor is the one in the back of the right head which tells the idle relay to have more rpm's when the engine is warming up. You might have an oil temp sensor near the filter housing if you have the lambda setup with an O2 sensor and frequency valve. This sensor tells the lambda computer that the engine is warm enough to go into closed loop.

Sorry if this is TMI.

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Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe

Chuck,

If the above is directed to me, I do have a warm-up regulator on the car. Been chasing a stumbling problem for months now and the WUR seems, at this point, to be the cause of the problem. Don't want to hijack this thread, so will post an update on the problem on another thread. Thanks.

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Don
'85 500SL (Euro) - 186,000 w/a complete restoration and engine rebuild at 154,000
'95 C280 - 174,000