VW golf plus 2006 diesel . Engine failure due to diesel crossing into engine coolant.

SOURCE: engine starts, runs (3 sec.), dies

Sounds like your immobilizer is activating. Try another key or you need to take it to a vw dealer for diag and adaptation.

SOURCE: My 2006 vw golf bew engine is having a p2108

try cleaning the throttle body with top end engine cleaner, if it lags you have a problem.

SOURCE: Vw Golf 98 clicking sound from engine when starting

If it just clicks when you are trying to start, the battery is low, near dead and needs recharge or replace.
If it starts and strange clicking continues, it is a sign of hydraulic valve lifters not functioning properly --which can be caused by low oil pressure (because of low oil level or bad oil pump). If the battery is good and drains dead after a while --something is connected that should not be. Even your dome light can do that --or the headlights on --or the parking lights on. Check the oil level, if low, add oil and check again.

SOURCE: Where do I put coolant in VW golf 2000?

coolant will go into the radiator,there willbe a cap indicating that its the radiator cap under the bonnet,can go into radiator overflow bottle as well but check level indicator on the side

SOURCE: how do i change the brake light switch on my vw golf diesel

The brake lights switch is fitted next to steering column under a dashboard.There is plastic cover-just follow the brake pedal and you will see the switch.Disconect the plug and turn the switch anticlock wise.