We have TGV tickets for December on TGV# 09578 leaving from Karlsruhe Hauptbahnhof for Paris' Gare de l'Est. The plan was to drive in from Heidelberg that morning and leaving the car in a car park in Karlsruhe for the weekend since this would cut travel time in half.

However, in researching the parking, it appears there are 2 different stations (one near the Schloss and another near the Schwartzwald Brucke) containing "Hauptbahnhof" in the title. I'd hate to miss the train because I was at the wrong location! How can I find out which one this specific TGV leaves from?

There is only one Hauptbahnhof/Central Station, which is nowhere near the Schloss, so I wonder where that comes from. Schwarzwaldbrücke is indeed near the station.

Wunderbar! Thanks for the confirmation.

Just to report back for anyone planning on using this train station...Karlsruhe's bahnhof is very easy, at least if you're arriving from the direction of Heidelberg, and very user friendly.
Breezed in and breezed out for our Paris (via Strasbourg) Christmas-time trip. Bought in advance it was 39 euros each way.

If you are planning on arriving by car and leaving it in long term parking, it is best to follow signs to "Hauptbahnhof Sud" Parking. Do NOT plan on parking in front of the Hauptbahnhof as it has only very limited parking time (i.e. 15 min).

In the Hauptahnof Sud Parking there are several lots, P1, P2, P3 etc., but for long- term you want to turn right immediately upon entering the large outside parking lot and follow the little road a short ways to parking P1. P1 is the cheapest long-term lot and is also a covered garage (whereas some of the others are not). It is well marked with signage/numbering so you can easily locate your car when you return. Keep the parking ticket with you rather than in your car; you will need it upon your return.

From the P1 door you will enter the passageway directly under the tracks, so if you have your tickets already you can just go to your assigned track (reference schedules are posted on the wall). There are also a couple of café/bakery self-serve places there if you need sustenance but don't have time to walk the tunnel further to the main lobby of the station. There is elevator service to the tracks as well, but be careful as it only services the 2 directly above it (don't want you to miss your train if you're running late!). You will also note a manned "Kasse"; this is where you will want to pay upon your return-don't use the self pay machine because if you present your train ticket to the cashier at the time you pay, you will receive a significant reduction off the bill.

If you have more time, the lobby of the station is very modern, clean and has several "sit-down" eateries to choose from. The information desk was manned and spoke "some English" (which when Germans say this=means they speak very well, generally, and they did). Train car locations are electronically marked along each quai at spaced intervals so it is very easy to be at the exact spot your car is going to stop at and make an easy entrance onto the train.

Happy Travels!

It's of course too late but...

There can be only one Hauptbahnhof in a city, by definition.

However there may be many tram/bus stops labeled "Hauptbahnhof + something-or-other", like "Main Station South" or "Main Station/xxx Street" declarinf their location towards the main station.