gfinneran

Sounds like there is a drain on the battery when its parked and/or the alternator is not charging it. Have you read the stickied water ingress thread at the top all of these cars leak water inside and will create a world of electrical problems if not caught early and repaired properly.

Pure Drive? If its a MK1 it will be a 2.0PD (Pumpe Düse) 140 not sure on the DPF they did arrive around then engine code would sort it.

Read the stickied water ingress thread at the top of the page from start to finish, just because the drain under the battery is working water can still enter the car through the pollen filter housing if it has not been sealed correctly. Other places are through the window regulator panel you will notice the sill being wet after rain.

You will get a better response if you move the post to the Mk3 section no estates in the first gen.

Door lock on its last legs probably especially its original, they will all fail eventually with cracked solder joints, if you haven't addressed the the water ingress points with corrective action you will get water in the car eventually and subsequent electrical issues related to same, these cars all leak not a matter of if but when, have a good read of the thread stickied at the top. Door locks can be got on ebay but some are of dubious quality pays your money and take your choice in that regard.

+1 on Ken above, look in up in Bosch, Valeo or other decent brand for each application and then compare part numbers, mounting, output etc

Probably build up of crud in the indicator switch contacts, maybe try some electrical contact cleaner, google the issue with the Passat B5.5 you might get some more hits.

Have you ever changed the gearbox oil? That would be a starting point (make sure you can undo the filler before you drain it! they are usually hex key type plugs possibly 17mm), will probably take approx 3 litres fill slowly till it starts to come back out the the hole (car level), see a Skoda or VW dealer for the correct spec oil and capacity, its not expensive. Has the clutch been replaced? Clutch Slave, Master cylinder? Not sure if its cable shift or rods on the Superb mine is auto, there could be a wear issue with them. Get on to ERWIN and pay for an hours access €7 you can download all the manuals in that time.

S0054020020-Heating__Air_conditioning.pdf

Blower Motor Installation | Volkswagen Passat Forum (passatworld.com)

Jamie you might be better off looking in the Passat B5.5 forums there is tumbleweeds blowing through here, use a multi meter to check power and continuity, It's either: - the fuse - the resistor - the motor - the switch - the wiring in between those parts.

'Water Ingress Problem'........SOLVED! - Skoda Superb Mk I - BRISKODA As a new owner read this thread cover to cover and check all the possible water entry points and repair them asap, you will have cheap reliable motoring. S0054190020-Maintenance.pdf

Mine just broke the 400,000 km mark during the week, its a 2005 1.9Tdi AVF 130 Auto Elegance top Irish spec car, I have owned it since 2012 and put 250,000 km of those on it, though a lot less per week in the last year with covid lockdowns! Its had the usual water ingress issues, door locks replaced, rebuilt the alternator, a couple of cv joints each side, shocks all round, full suspension arms up front, multiple tie rod ends, heater core leaking which was a dash out job to replace not difficult just time consuming and help needed to do it. I have had the egr and intake off to clean them out but everything on the engine is still original. Reverse started slipping around the 200k mark and just after I had replaced the fluid, so I have lived with it that way since and not changed the fluid since, just careful where i park avoiding having to reverse up inclines etc, I think its the reverse drum issue but i am not spending 1500 to fix it and will drive it till its unusable, all forward gear changes are smooth and no issues. Used car prices are going up here with the import tax changes following Brexit so I think I will run it on till till its demise, with their weak points addressed and the 1.9tdi 130 engine they will go a long time, considering it is almost a 30 year old design originating with the B5 Passat in the 90s . I know a lot of the old heads on here have moved on to greener pastures but who else has a high mileage superb still working away daily?

As above fill slowly till it starts to come back out the filler hole, make sure the car is level, as these cars go it is a cheap fix for piece of mind, the output shafts on the gearbox can leak at the seals, if you use the search function it will throw up some threads.

Definitely worth doing if never done should help the shifts especially when cold, MAKE SURE you can open the filler plug before draining should be hex possibly a 17mm for both plugs, use the correct oil from Skoda/VW, they will be able to give you the capacity figure, make sure the car is level when you are draining/filling and add the oil slowly until it starts to come out the filler. The clutch uses brake fluid and is unrelated, I would leave the clutch to a professional unless you have the skills they are not easy to bleed and generally dont need work unless there is air in the system or the clutch master is faulty. Clutch wear is dependent on driving style, but should last longer than that unless there is a parts failure.

'Water Ingress Problem'........SOLVED! - Skoda Superb Mk I - BRISKODA +1 for jimbof's call read this from start to finish my money is on corrosion in the wiring, convenience module soaked in water under the carpet

Passat from 1996-2005 B5/B5.5 should fit cross check the part numbers.

Try banging the door near the lock while pressing the lock/unlock button it might be enough open it, if you do get it open disconnect the electrical plug in the going through the rubber bellows from the B pillar to the door, this will alllow you to lock/unlock manually until you have a chance to replace the lock mechanism, they are available on ebay they are common problem cracked solder joints.

Nice job, you really like a toasty seat!