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1989 560sl cruise control

3K views 6 replies 5 participants last post by  Ruindr 
#1 ·
Can somebody please explain to me why my 1989 560sl cruise control only works reliably when outside temp is above 60 deg? Is it the ampliphier? And if so where is it located?
 
#2 · (Edited)
Almost certainly bad capicators on the board. You can attempt to replace them yourself or send the card out for repair - which is recommended as cold solder joints are also a known problem. I attempted a fix and failed so sent it out and it's been great for over a year. The box is behind the drivers side dash and is a bear to get to. I recommend just leaving the box in place and bending the retaining tabs a bit and sliding the board out.

JamesDean is the guy you want for the job - http://www.peachparts.com/shopforum...l-amplifier-diagnostics-amplifier-repair.html
 
#4 ·
When you pull the Cruise Control Amplifier board out,
this is what it looks like:
 

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