GBW

I took the car into my local garage for a suspension and tyre check but they found nothing untoward. It would be easier to diagnose if the problem could be invoked but, try as I might, I cannot.

I hate intermittent faults! Around 40-45 mph, I have experienced a worrying small oscillation in the steering wheel at a frequency of around 5Hz. It has happened maybe around ten times during my ownership. It seems to disappear when the speed increases slightly. Despite my best efforts, I have not been able to induce it. It lasts for around 5-10 seconds. Hard acceleration, hard braking, violent weaving - no result. The first occasion, I assumed the wheels were about to fall off. They were not. I thought maybe the assistance was electric but, a glance under the bonnet, proves it is hydraulic (and, yes, the reservoir level is correct). It is not clear whether the steering actually judders or whether it is just the wheel. I am no whizz on modern cars (although have '79 MGB V8, and a couple of BMC 1.5 marine diesels under rebuild) and have no clue what the cause could be. Anyone with a similar experience please?

The windscreen was caged - £350. The seller split the cost 50-50. Following the steer, "JagRepair" reveals that the cruise control switches connect to the electronics via two wires only. Determination of which of the four switches is pressed, is by change in resistance. Quite an interesting solution. That being the case, it seems unlikely the switchery is at fault. It's off to Jaguar I guess!

Thanks for all the info. The seller has agreed to look at this (and the front screen in which the electrical heating doesn't seem to work - sounds expensive!). I have tried holding the switches down for longer than seems necessary but to no avail. The fact that both will switch on the CC suggests that electrically they are ok.

Not a big deal but it would be nice to fix. The switch is labelled + SET -. Pressing it will engage cruise control at the current speed but subsequently, pressing + or - does not adjust as expected. The car is in warranty but is this something trivial to fix? The fact that the switch works suggests software.