I swear, it never ends.

But the radiator in the cabrio has a very small crack, pinhole on the right end tank(when looking towards the back).

JB weld fix or do I have to shell out $300 for a new radiator(which I can't afford at the moment)

if anything I'll just sand the spot down tuesday at work and put some Maxim on it ( maxim is a 3M adhesive that can stick KY to Vaseline)

Plastic tank? Or metal?

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra

Is the 300E radiator the same? If so, I have a good radiator. (1990)

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1959 Gravely LI, 1963 Gravely L8, 1973 Gravely C12
1982 380SL
1978 450 SEL 6.9 euro restoration at 63% and climbing
1987 300 D
2005 CDI European Delivery
2006 CDI Handed down to daughter
2007 GL CDI. Wifes

Rather than sand paper hit the spot with a wire brush to put some striations on the tanks plastic, then hit it again 90 degrees off to cross hatch it, wash it clean with acetone before you put whatever stuff you're using.

Start saving your pennies for a new radiator.

The famous broken neck problem is on it's way

It will probably fail far away from home and a M.B. service location.

Buy a Behr or Nissens before it's too late.

It's not a broken neck. The crack is no where near the neck. Plus the radiator already has the metal inserts.

I would clean it up really well and try JB Weld. It does not take to much to hold back that low pressure in a small crack.

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Junqueyardjim
Christianity, if false, is of no importance, and if true, of infinite importance. The only thing it cannot be is moderately important. C.S. Lewis



1983 Mercedes W123 240D 4 Speed 285,000 on the road with a 617 turbo, beautiful butter yellow, license plate # 83 240D INDIANA

2003 Jaguar Type X, AWD. beautiful, good mileage,
Mom's car, but I won't let her drive it!

Sounds good to me! Someone recommended black pepper, but I don't want to have to flush the system if it doesn't work.

If the tank is plastic, and is exhibiting this type of failure, I would not expect much longevity from any repair. It will just fail again in a different place. Worth a try of course. Just don't be surprised when it leaks somewhere else.

__________________
1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra