I ran the codes (E0) codes on my w140
(1993 300SD) and got 98 and 99,
indicating a short/open in the aux. fan.
Is this the blower fan or is this the
fan in front of the radiator? The blower
fan will run at high speed. Is the cause
of the 98 and 99 code the blower
regulator? (I replaced mine a 2-3 years
ago).

Thanks for the help!

-Ralph

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Ralph Burnette
1993 300SD (286k + miles)
2000 SL500
2001 ML320