To follow up.. OVP was the cause of a low idle when cold, high idle when warm.

By the way, ABS light won't always be on if your OVP is failed. Particularly on a car with ASD - there are 2 circuits inside the OVP.

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190E's:
2.5-16v 1990 90,000m Astral Silver
2.0E 8v 1986 107,000m Black 2nd owner
http://www.maylane.demon.co.uk/190esmall.jpghttp://www.maylane.demon.co.uk/190esmall2.jpg