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  #1  
Old 03-26-2004, 07:35 AM
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Join Date: Oct 2001
Location: Detroit.MI
Posts: 8
'89 300 SEL cruise control

300SEL, 1989.
Cruise control is continually searching for the right speed, fluctuates in a 3 mph range, up and down, over and over.
Unusable because of the surging.
It basically holds a speed but surges back and forth to do it.
It has worked fine for years, then this condition started.
My mechanic says it probably is either the amplifier or the actuator, but he is not sure. any suggestions? Thanks
Ladster1

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  #2  
Old 03-26-2004, 10:18 PM
goldstone's Avatar
W126 Lover
 
Join Date: Oct 2002
Location: Dutchess County, New York
Posts: 158
Your mechanic's right! (My bet's on the amp though.) Do a search; there's tons here on dealing with this well known problem. Good luck!
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Eric

1991 560SEL-Euro (214,000 miles)
1989 420SEL (Retired from daily use at 325,000 miles; Use as donor vehicle)
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  #3  
Old 03-27-2004, 01:45 AM
wbain5280's Avatar
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Join Date: May 2001
Location: Northern Va.
Posts: 3,386
It boils down to resoldering the electronics.

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Warren

Currently 1965 220Sb, 2002 FORD Crown Vic Police Interceptor

Had 1965 220SEb, 1967 230S, 280SE 4.5, 300SE (W126), 420SEL

ENTER > = (HP RPN)

Not part of the in-crowd since 1952.
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