Temp Sensor for Cold Start Valve on MC2 200Q

[Phil Payne]

> Looking for advice as to the location of
> the temp sensor that activates the cold
> start valve on an 89 200Q, MC2 engine. Is
> it on the coolant flange neck, on the side
> of the head or the rear of the head (although
> I still can't seem to find one back there)?

It's an ECU function on the MC2 - have you tried Scott Mockry's site?

You can mess around here.  The PO of my Type 44 had an alarm light on top of the binnacle.
I've replaced this with a flush-mounted pushbutton connected with the diagnostic plugs in the
footwell, and I got the proper insert for the eyebrow dashboard from Audi to give me a "check
engine" light.

This lets me operate the CSV manually from the driver's seat.  Press the button and switch on
the ignition, then you can step through the diagnostics until the CSV fires.  I used this
trick to start another Type 44 yesterday - I was quite surprised that the MAC14 fires the CSV
10 times - the MAC12D (ur-quattro, MB engine) will only fire it 5 times.

-- 
  Phil Payne
  http://www.isham-research.com
  +44 7785 302 803