bigsl550fan

I have silly question, I was trying to set the cruise control and instead of just holding the speed it asked me with a blinking MPH to enter? I tried everything to set it and it wouldn't work?

It did work prior but now it seems to not work.

Also do our cars have distronic plus or is it for other mercedes models? I do see a setting for radar in the on the dash settings?

VaclavSV

Are you in SPORT traction setting? My cruise doesnt work unless the traction is on.

I am Jeff

If you disable traction control, cruise control is disabled.

jevzone08

I have a similar problem that started today. When trying to activate cruise control just get a blinking line almost prompting you to input the desired speed. Tried everything to set it but no joy.

Anyone any ideas.?

SaphGreyC63

Push it up or down or pull it. Something like that and it will work.

jevzone08

Thanks but have tried that already...

b16

I think Manual mode also disables the cruise.

jevzone08

I've tried in eco, sport and manual...

Mort

From the Manual:

You can activate the cruise control
.at a vehicle speed above 20 mph (30 kph).

You cannot activate the cruise control
.when you brake
.parking brake engaged
.in park, reverse or neutral
.ESP Off or switched off due to a malfunction

vessproms

make sure switch on the traction

jevzone08

Checked with all the above, all drivers aid systems active and operating as normal... except cruise control. bigsl550fan have you managed to fix. Seems like a unique problem.

Mort

Did you check for blown fuses?

jevzone08

Looks like it was a symptom of another problem. I was kindly informed by a tailing driver that the brake lights were sometimes staying on constantly...! Quite dangerous really.
Anyway, sent it in for some time with the dealer techies and the culprit was a faulty brake light switch.

All resulting problems including cruise control issue now fixed and driving perfection resumes.

Mort

Thanks for posting back with the cure. Discovering the faulty brake light switch was a good deal by the following driver. Some times people just drive with their foot lightly on the brake pedal and the other driver might not of thought to say anything. Diagnosing electrical faults can be difficult at times. Good to hear everything is back to normal.

benzmodz

If you look at actual values in Xentry it will show which switches are active. Would have taken less than an hour to hunt down.