Date registered: Nov 2007
Vehicle: '73 450SL, '83 300CD, '88 300SE
Location: Upstate Central NY
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Well, a lot of brilliant inspectors might suspect that the rocker panels are part of the frame, they like to rust, but further under are two 'frame' rails and I've seen those rust too, where it comes together in the area between the front and rear doors.
The nice part is that if it's isolated, everything is fairly square, and it should be easy to clean up around the nasty spot and weld in some new metal. Then you can do some fancy undercoating work and maybe you could get it through for another year.
If getting it right means making a patchwork quilt out of the undercarriage, then it's probably not worth the effort, but if it's in one specific and concentrated spot, it's probably worth it to repair if you have some money into this car.
ASE Master tech, specializing in electronics and driveability.
Certified Diesel Master tech.
EPA 609 certified
1973 450SL - 191K - Summer Toy
1978 300D - 267K
1978 300CD - drove to death
1981 300D - drove to death
1983 300CD -170K
1989 300SE 105K miles..
1981 Coupe DeVille.. just because.
... and many more past and present...
Because Safety is not a luxury. Mercedes-Benz. Engineered like no other car in the world.