Everything I have read lately points to the cruise amplifier being bad, if you can engage and accelerate via the stalk control. If the cruise disengages as soon as you let go of the stalk I would say "bad amp". I just went through this with the 560 in the course of my trouble shooting and repair- one of the amps I installed did as you describe. I changed the amp and cruise works fine.

__________________
Mike Tangas
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72

'02 CLK320 Cabriolet - wifey's mid-life crisis

2012 VW Jetta Sportwagon TDI...at least its a diesel

Non illegitemae carborundum.

My cruise does not appear to be working (engage and set). but I can accelerate with the hand control. Can I assume the servo amplifier and servo are working, or is it just hopeful thinking on my part. Is there any available schematics on this system both electrical and block diagrams?

PeterG




79 300SD 75K miles
89 Jeep 180K miles, and nobody wants
69 Shelby 350GT Conv 54K miles
96 Chrysler Concorde 120K miles and a new cam belt, wtr pump(second time) and idler. Lesson learned always replace the idlers,they do fail.