Solved: Rust never sleeps - Water edition

[pnegyesi]

Is the word "Saint" where I need to find a connection to?

[Wendax]

No

[pnegyesi]

I fail to find any cars related to Fenollar.

[Wendax]

Keep searching! 

[pnegyesi]

Maybe Rust G as there was a French buggy called Fenollar

[Wendax]

Yes, another one solved!

[pnegyesi]

It will be a great relief to learn about the connection between Gangloff and the relief. Then another one will be solved.

Any other AutoPuzzlers would like to join the fun ?

[norberthanke]

Rust K is a Borgward Isabella. I owned one in that colour! My very first vintage car.

[pnegyesi]

Rust K is a Borgward Isabella. I owned one in that colour! My very first vintage car.

Would you like to follow this lead? Finding the water connection takes about 1 minute And then you can think about the extension!

[norberthanke]

Has something to do with "water 10" Isabella fountain, I suppose...
Rgds
Norbert

[Wendax]

Welcome to AutoPuzzles, Norbert, Rust K is indeed a Borgward Isabella and Water 10 is the Isabella fountain. Now this combination is locked for you to find the automotive "Extension" connected to the place where you can find that fountain. I hope you enjoy this rather special puzzle as much as all the other challenges on this site.

[norberthanke]

My guess extension r - a race in Granada.

[Wendax]

Sorry, Extension r is not in Granada.

[norberthanke]

Extension j, a car named Columbus, right?

Rgds

Norbert

[Wendax]

No

[Tom_I]

I think Rust I is a Lancia Trevi in 'typical' condition. There's nothing obvious to match it in the Water section, but I wonder if you were to zoom out from Water 15, you might see Anita Ekberg in a black dress paddling in the Trevi fountain in Rome, in the film "La Dolce Vita"?

[Wendax]

Tom, I knew you would be attracted by this puzzle. 
You are absolutely right with Rust I being a Lancia Trevi and and Water 15 showing Anita Ekberg in the Trevi fountain. This combination is now locked for you to find the matching extension.

[Tom_I]

I haven't visited much recently, but this puzzle has lured me back, though it looks very difficult.

I'm not sure about the matching extension. All I have so far is Extension q, the Mercedes 300S which appears in the film "Three Coins in the Fountain", where the three female leads stop at the Trevi fountain to cast their coins (or not). But maybe there's more to it than that...

[norberthanke]

rust B
Singer Rapier "Cabriolet", ("convertible" in US). "Roadster" might not be the correct specification in case of a 4 or 5 passenger car. A small lesson in this respect....
Norbert

[Wendax]

I haven't visited much recently, but this puzzle has lured me back, though it looks very difficult.

I'm not sure about the matching extension. All I have so far is Extension q, the Mercedes 300S which appears in the film "Three Coins in the Fountain", where the three female leads stop at the Trevi fountain to cast their coins (or not). But maybe there's more to it than that...

It is really as "easy" as that, nicely found.

[Wendax]

rust B
Singer Rapier "Cabriolet", ("convertible" in US). "Roadster" might not be the correct specification in case of a 4 or 5 passenger car. A small lesson in this respect....
Norbert

It is a Singer Cabriolet, although not a Rapier. A nice start.

[norberthanke]

I am silly,
Singer is Singer
Rapier is a model made by Sunbeam
it is a Singer Gazelle
(I once joined the Singer Club GB - was after a Vogue - never realized it
in my opinion one of the most typical classical British sedans - I am not so interested in GB sports cars

Norbert

[Wendax]

Yes, it is a Singer Gazelle. 

[Wendax]

All unlocked. I've added a list of incomplete answers below the correct solutions to make it a little bit easier for you.
And the 5-point limit is lifted now, as I just wanted to prevent somebody snatching all the points at once. 

[pnegyesi]

per suggestion from Tom_I, here's the possible explanation between Gangloff and that roman relief