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w123 cruise control problem

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monarchd's picture
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My w123 (1984 300D turbo) has developed a cruise control problem. When cruise is activated the throttle continues to accelerate until way beyond the set point then abruptly stops until it decelerates to the correct speed then starts the process all over. Can anyone let me know how to repair this?

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ScottinSoCal's picture
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Re: w123 cruise control problem

anthracite;126184 wrote:
My w123 (1984 300D turbo) has developed a cruise control problem. When cruise is activated the throttle continues to accelerate until way beyond the set point then abruptly stops until it decelerates to the correct speed then starts the process all over. Can anyone let me know how to repair this?

Your cruise control amp is going. Replace it and the problem will be solved.

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rogo's picture
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Re: w123 cruise control problem

Is your control cable adjusted properly. I only ask because your system seems to be hunting. It would be hunting if there were some slack in the mechanical portion of the system.

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Virginia Beach VA

87 300SDL
95 E300D

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George Murphy's picture
Oak Ridge, TN
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1999 C43 AMG
Re: w123 cruise control problem

I have reman amps available - contact me at address below . .

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George Murphy

MBCA Technical Director

865-482-9175

1999 C43 AMG

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