Water leaking onto dashboard

die ersten Sprinter (T1N)
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Hughlle
Beiträge: 2
Registriert: 03.09.2025 18:41

Water leaking onto dashboard

Beitrag von Hughlle » 14.03.2026 14:23

Greeting from the UK. Sorry for not speaking German.

Does anyone have experience with water leaking into the cab above central dashboard? It seems to happen most when inclined forward slightly. This has been happening for a few months now
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IMG_8014.jpeg (1.99 MiB) 1735 mal betrachtet
Removing sunvisors and looking under head lining, water appears to be running down the chassis from above the windscreen (so it is t the windscreen leaking. Maybe the seal between the chassis and the sleeping pod?

Any help very much welcome. All the electronics for the 3rd party alarm and immobiliser are directly under the leak! They’ve already shorted out once before, and I’m currently in Switzerland so cannot afford for that to happen right now :lol:

Thanks, Hugh

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iCook
Beiträge: 491
Registriert: 03.05.2007 07:24

Re: Water leaking onto dashboard

Beitrag von iCook » 24.03.2026 21:51

Hello,

Welcome to this forum! What a shame that it is leaking onto your dashboard, I'm sorry to understand that. The reason will probably be the seal between the roof and the body. If so the sealing needs to be replaced. Removing the old sealing is a lot of work and while doing so you might want to look for rust and use Sikaflex to fix it again. If you are interested to study the topic, please use the search function and look for the German word "Dachnaht".

When investigating the reason for your water ingress, please also make sure that all your roof windows are in good condition.

Best of luck!
Regards

Wolf
| Conquerors of the useless JC 316 CDI | cavity sealed, serviced w/ -`♡´-| LPG ♨, LiFePO4, B2B charger, inverter, solar panels fix + foldable on separate solar chargers, RV-tech Heki, Wolfbox G900TriPro, add'l 12V cooler in trunk for 'proper' drinks + food |

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Lincoln
Beiträge: 252
Registriert: 04.03.2020 15:23

Re: Water leaking onto dashboard

Beitrag von Lincoln » 24.03.2026 22:25

Take a look here in the forum under the keyword ‚Rost am Querbalken‘ or ‚Scheibenrahmen‘.

Feel free to share some photos once you've removed the headliner in the cab!

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Never ending project
Beiträge: 495
Registriert: 21.10.2020 09:09
Wohnort: Braunschweig

Re: Water leaking onto dashboard

Beitrag von Never ending project » 25.03.2026 01:01

Hallo Hugh,
ein paar Kandidaten für die Undichtigkeit sind schon genannt worden, Dachabdichtung in der Regenrinne, Dichtung der Seitenfenster, Dichtungen und Eindichtung des großen Dachfensters oder, was mir eventuell noch einfallen würde: der Boiler hinten im Fahrzeug liegt auch ziemlich hoch, sind dort alle Leitungen intakt und der Boiler selbst noch dicht (kein Frostschaden).

Wünsche Dir eine schnelle Feststellung der Ursache
und eine gute Reparatur
Gruß aus Niedersachsen / Braunschweig vom Arnd
Hauptsache: Daimler.......man gönnt sich ja sonst nichts! JC 1986 "Wanderdüne" 260000km (T1) ;

Hughlle
Beiträge: 2
Registriert: 03.09.2025 18:41

Re: Water leaking onto dashboard

Beitrag von Hughlle » 02.04.2026 16:57

Thankyou for the replies.

This only occurs when the van is moving. The issue also first arose after the windshield was replaced, it seemed to be the only variable that changed. Prior to the replacement, we drove home for 3 hours in torrential rain no problems. The seal between the cab and top looks a little worse for wear, so will start with that, and then assess. It has been sat in the rain since getting back to the UK with no leaking present.

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