1976 450 SE water in cabin
I just bought a W116 1976 450 SE from the original owner, Australian compliance. Always garaged and is visibly rust free (door seal area, boot lid area, rear windscreen frame, sunroof all appear good). However in heavy rain water collects in front passenger footwell and also under rear seat ( under actual seat which I removed) and also rear floor pan. The floor pans are free of rust ( I removed all the carpet and sound deadening), but there is a little bit just under the glovebox on the floor pan where the seam is.
The car has a factory sunroof.
Does anyone have any tips on where to start looking? It’s a beautiful car that’s a time warp and was treasured by it’s one owner and I’d love to keep as long as possible. It’s my first Mercedes, having Volvos in the past that also had water penetration issues.
Thank you!
John
Sydney, Australia.
Check door and window seals.
Sit inside while someone outside sprays it with house and look.
Check firewall area.
Cowl drains get plugged up too.
Windshields and rear windows leak.
The 116 is a flexible flyer compared with modern cars... door seals need to be soft enough to fill in the space as the doors move around with every bump. Not joking.









