I'm considering towing a 16' camp trailer with my 1980 300sd. The car is in excellent mechanical condition and has plenty of power. Is this too much for my car?

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Current:
'95 E300D 282K
'85 300D - 253K

'11 Subaru Forester


Before:
'97 E420 - 135k
'80 300SD - 269K
'66 200D - ???K