1993 190E 2.6 Has been overheating, loosing water and water pump howls. Bought new pump, thermostat and wish to have radiator rodded out.

1. Top radiator flange and hoses are off, front electric a/c fan plate detached. The right (passenger) side of the radiator lifts up nicely a couple of inches to come out but the left (driver) side is totally stuck. I have fore-aft movement but nothing upward.. The radiator won't budge upward on the left side and I find no bolts underneath which could be holding it. I've wiggled, pulled and grunted but nothing. What could be holding the radiator down to it's cradle on the left side?

2. Any other thoughts for this job, like how to loosen the serpentine belt? or what goop to put on the 'O' rings for the pump? or what tool to use on the pump mount - is it a metric allen (haven't gotten that far yet?

thanks

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1993 MB190e 104k