W208 Cruise Control Cuts Out at 76ish?

[DarrenG]

Been working fine until recently. Can engage cruise and it'll work fine at speeds below 76'ish mph. Above that it'll randomly cut-out, sometimes secs after engaging, on others it might last a min or two.

I've looked at all the other posts, running approved rims and tyres which haven't changed, tread looks pretty even across all the rims as well. Any ideas?

 

[stevesey]

I've looked at all the other posts, running approved rims and tyres which haven't changed, tread looks pretty even across all the rims as well. Any ideas?

Checked tyre pressures? Might just be enough to kick it out.

 

[BlackC55]

what wheels you running? Standard or aftermarket? Do you have the correct size tyres?

BTW remove your advert as It is now not alowed.

 

[DarrenG]

It has the staggered AMG Rims, 245/40 on the rear, 225/45's on the front. Falken FK452's all round.

 

[BlackC55]

Those sizes seem ok.

Do you have any esp lights on?

 

[DarrenG]

No errors on the dash.

 

[BlackC55]

Tyre pressures ok?

 

[DarrenG]

I'll check them again tomorrow, I say they 'should be' as I checked them before I drove home from Wales last week and they were all within 1 or 2psi of each other. I normally run them all at 31psi. It was on this journey that the issue first appeared.

I'll check then tomorrow, I need to get a gauge as I don't trust the garage gauges. How far out would they need to be to cause an issue, more than a few psi I'd hope?

 

[BlackC55]

They should be 30F 33R with no passengers or much luggage.

It might be worth just checking some values on a Star. You may find an ABS ring not quite right. Tricky one.

 

[DarrenG]

Cheers, it's going in in a fortnight for the service and MoT so if nothing obvious crops up I'll ask for it to be looked at then. if it's not one thing's its her mother

Cheers for your advice.

 

[BlackC55]

Cheers, it's going in in a fortnight for the service and MoT so if nothing obvious crops up I'll ask for it to be looked at then. if it's not one thing's its her mother

Cheers for your advice.

Anytime. Thats what i'm here for

 

[Flyer]

If you find the reason, please post back here, as I still have the same problem (although mine is at 81mph).

I've got the same tyres and tyre sizes, but I'm convinced it's not that. Not had chance to get it on Star, was going to ask Jay to do it at the GTG.

 

[DarrenG]

Is yours 81mph on the clock? I'm not sure if mine was 76 on the GPS, if it is then that could put us in the same area. Checked the tyre pressures and all but Fr O/S are bang on. F O/S was down 29psi.

 

[Flyer]

On the clock, so could be a true 76.

I posted about it a couple of months ago: http://www.mbclub.co.uk/forums/showthread.php?t=63920, but not resolved. Someone must have had this problem!