cruise control on 99 c250 td fault

[laurence]

Hi All,
has anyone any ideas why my c250td estate 202 auto cruise only works at low speed (only works up until 35 mph).Car has done 135k and only just bought it.Also when starting up (hot or cold) engine will not rev (traction light comes on) at first when driving,after 2 minutes it works and revs just fine.This cannot be normal can it?Just for ref,the car has had non return valve by the main dealers a few years ago and starts first time,then runs like a dream.

 

[JEZ.S320L]

Hi All,
has anyone any ideas why my c250td estate 202 auto cruise only works at low speed (only works up until 35 mph).Car has done 135k and only just bought it.Also when starting up (hot or cold) engine will not rev (traction light comes on) at first when driving,after 2 minutes it works and revs just fine.This cannot be normal can it?Just for ref,the car has had non return valve by the main dealers a few years ago and starts first time,then runs like a dream.

Hello and welcome to the Forum.

First things first. Concerning the CC issue, have you checked that the tyre sizes are correct for the vehicle?

As for the engine problems, others with more knowledge about engines will be along soon.

 

[turbopete]

if the engine ecu thinks the traction control is operating, it will kill engine power and id guess not rev. as stated, check tyre sizes, also id consider checking the brake light switch. theyre a common problem for cruise control and cheap to replace.

 

[television]

Rust on the rear toothed wheel can do this on the speed sensor

 

[laurence]

re cruise control

Malcom,
Thanks you for reply,would you please be kind enough to let me know where the sensor is located?Kind regards Laurence

 

[television]

These are the pick up sensor

http://www.detali.ru/cat/oem_mb2.as...GM=717.460&CT=F&cat=45H&SID=54&SGR=680&SGN=23

These are the front

http://www.detali.ru/cat/oem_mb2.as...GM=717.460&CT=F&cat=45H&SID=54&SGR=663&SGN=22

A slight glitch on the sensors can stop the CC but not bad enough to upset the ABS

Just make sure that they are clean.

Not an easy fault as many things can turn off the CC but you have to start somewhere

 

[laurence]

cruise control problems

Malcom,
you are very knowlegable,will try your sugestion and let you know of my sucess.Good response to my problem already,thanks again for your time. Kind regards Laurence

 

[television]

If you do not have any luck after that then other things can be checked