209 (3.2) cruise control not working

Iankh

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Your Mercedes
CLK3.2 2003
Just acquired a CLK 209 and the cruise control does nothing except occasionally flash some dashes on the speedo. Any ideas it is running on 19inch AMG wheels?
 

Blobcat

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Your Mercedes
R171 SLK280, Smart R451, Land Rover 110 County SW, 997 C2S, R1250 GSA TE 40th, CBR600FP
Hello and welcom,

Have you changed the wheels (and tyres) sizes so they’re significantly different from stock? Have you now an overall diameter difference front to back?

If either of the above then the wheel speed sensors can give information the control unit isn’t happy with and so won’t allow cruise to work.

If wheels and tyres all good and stock equivalent then I’d check that all the wheel speed sensors are working correctly. If you have an OBD port and a Mercedes specific scanner you can read wheel speeds.
 


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