I got the above code on my scanner. It says Coolant temp range performance? What do I replace? Is it the one on the thermostat housing? My 124 has had several temp sensors. By the way, the AC does not work either.

Please help!!

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Mino Erhan Dallas, TX
'97 SL500 40th A.E.
'97 S320
'01 ML320
'85 Peugeot 505 SW
'07 BMW R1200RT
'74 Suzuki GT750

Somewhat a rare code. However that means that a return voltage signal to the computer from the sensor was implausible. Either no voltage(open circuit) or too high of voltage (shorted sensor) was received by the computer. TRY a new sensor if the wiring looks OK!

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Thanks for the reply, 2 questions
1) Which sensor am I looking at?
2) Do I have to reset the ECU, or is it self re-setting once I fix the problem?

Thanks alot.

__________________
Regards

Mino Erhan Dallas, TX
'97 SL500 40th A.E.
'97 S320
'01 ML320
'85 Peugeot 505 SW
'07 BMW R1200RT
'74 Suzuki GT750