Skodawally

Success! If anyone has the problem I had - flashing glow plug light after about 10 - 20 miles of every journey in a Superb Mk1 140 TDI (no other model) - don't panic. Having checked your brake lighting bulbs, switch etc. it is very likely your DPF is low on fuel. You might like to take it to have the codes checked to confirm, but I was confident enough it was this to have a go.
 
Problem is you will be asked for around £300 to have it done. It is an easy fix. The only tricky bit is parting with the cash for the Dealer supplied DPF fluid. Don't risk any alternative.
 
Firstly, take out the spare wheel. You will have a hump in the boot floor in the middle of the wheel well if yoyu have this car. Otherwise I understand you won't. To the right of the centre thresed hole for the wheel clamp boss you will see two black plastic oval shaped bungs. These will come out with a flat blade or your fingernails.
 
Under these are two black plastic caps. These have a little 'catch' at their base. These are off white plastic discs which spring across to hold the cap in place. To remove the cap, hold the top of the cap with pliers and push in the edge of the white catch with a screwdriver or something (I used an offset brake bleeding spanner, but anything you can push it with will work. The cap will come off easily. Do both caps as one is a filler and the other a breather to allow it to fill.
 
The fluid does not need to be under any pressure and you don't need a special tool as some say. it just pours in. You will need to rig up something to make sure every drop goes in... I used a half metre of 8mm fuel pipe bought for a couple of quid with a small 70p plastic funnel pushed into the end. I pushed the other end as a tight fit onto the filler hole, which is the one nearest to you.
 
Pour the stuff in. You will know the tank is empty by the sound of the fluid hitting the bottom... When you've finished push the cAPs back on until they click into place, replace the bungs, put the spare back and close the boot. Job done.