2006 Vauxhall Meriva no one knows

Let's go through the checklist: what see outside temperature that you are trying to start the vehicle in? Is the vehicle hard to start? When it is cold or when it is hot? Have you kept up with the standard maintenance? Primary and secondary fuel filters? Have you loaned the car to any of your friends? What color is the smoke that comes out of the exhaust when it is cold? What color is the smoke that comes out of the exhaust when it is hot? Does it have a vacuum leak? In other words are your heater controls working properly? Checked some of those things out and bring me word.

Does your vehicle have a plug-in? Where you can plug it into the house at night time so in the morning the vehicle is warm? It's called a block heater

The exhaust that looks like steam is normal, but how long do you let your car warm up in the morning? On a very cold morning you should let it idle for at least 15 minutes, diesels are very cold-blooded it takes them a long time to warm up until they run correctly. I'm assuming because the vehicle is not close to your house that you started up just for a few minutes and then leave is that correct? Keep me updated.

Because we do not have those vehicles in this country (U.S.A) it is difficult to find any kind of information but let's try something else, before you started in the morning with the key on waiting for the glow plug light to go off, pushed the accelerator all the way to the floor and back up two (2) times, let's see if that activates a cold start situation for the computer. Also I recommend that you let the engine warm up at least 10 minutes or serious engine damage may occur. What I do with my diesels is I make an extra door key so I can lock the car while it is running, I also do that on shortstops so I'm not turning on and off my diesel all the time which is also very hard on it. If you can send me a picture of the engine compartment.