REMOVE BATTERY

SOURCE: 1998 vw passat

hi if the electrical side is ok leaves two options mechanical or fuel so if you can let me know what happened leading up to the car not starting i will be able to point you in the right direction it seems funny you should mention the security system [this does control the fuel pump but what makes you think this may be the problem, yates210456

SOURCE: 2004 VW passat not heating

COLD AIR WHEN IDLING COULD BE...
1) Low on coolant - the most common reason for this heater problem. Make sure your coolant level is full.
If the level is low, it could be because the radiator cap is not sealing well or it could also be a cracked overflow container (hot coolant that bleeds out of the engine and drops to the street so you never see the puddle on your driveway).

2) An air-lock in the coolant system - it needs to be burped. Park your car facing-up the steepest hill you can find. Remove the radiator cap a (be careful - best to do when engine is cold) and rev engine to 2000 RPM for 60 seconds - hopefully the air will burp out the cap. Top it off with 50/50 antifreeze.

3) A disconnected or cracked vacuum line. I've heard about this one but never investigated.

SOURCE: Removing front calipers to 2003 vw passat w8

go to a tool store and ask for an easy-out, this is a specialty tool placed on a drill to grip stripped screws and broken bolts

SOURCE: Does anyone know what power steering fluid I need for a VW Passat

Mineral power steering fluid only from dealer $30, 1 gal
other oils have been causing the pump not to operate
properly on 99+ passat, jetta, golf, 99+ a4, a6, a8 .

SOURCE: Changed battery in 2004 VW Passat - radio is completely dead

there is another fuse at the back of the radio. if that fuse is ok check if there is power comeing to the radio if there is u will need a new radio