I've had a series of apparently random problems, of which the latest was the depollution fault. It happened on Christmas eve as I was about to drive down to Nottingham. I called the the garage hoping they would take a look at it, but they were just shutting down for the holiday. I was told not to worry about it if the car was running ok, so I drove South acutely aware of the orange light on the dash. At the same time the air conditioning went totally haywire. Later that evening both problems disappeared. Prior to this, I'd just got my car back from the garage on the previous Friday when they had investigated a "Water in Diesel" problem. Apparently the C4 VTS doesn't have a sensor for this, so I was somewhat surprised. At the same time they checked out the coolant system as I'd had a message saying "Coolant Low", but they could find no fault. I've also had problem with the boot remaining locked when I stop until I relock the car and try again. On another occasion I was driving when suddenly an alarm goes off to tell me that the passenger isn't wearing a seat belt. I didn't have a passenger. My first problem was the worst though, and I can't help wondering if they're all related. My car refused to start one afternoon at a motorway services in Germany. (Citroen Assist had never heard of me, and later on, when they had heard of me, they briefly lost my car!) They replaced a valve (On my return I was told the valve had already been replaced as part of a product recall.) Just before I was due to return the car broke down again with the same problem. The Citroen garage Auto Rau in Ruedesheim were superb, and put all hands to the deck to get me on the road again before the bank holiday on the next day. As I understood it, there was an intermittent communication problem between control units on the car, and if I was staying longer, they would replace the LAN cable. (The complete wiring harness I think?) On my return to England they updated the software on the car and told me it was fixed. About a month later, the problem happened again. So, while my current garage is being very helpful, they suggest they need to see the fault to diagnose it. (For other reasons entirely I recently changed garages... but that's a real horror story.) My manaufacturer's warranty is rapidly running out and I fear I may have to change the C4 before it becomes a liability, which is a shame, as for all its faults, it is a wonderful car.
