My 95 can run up to the 100 mark on a warm evening in Texas. Consider that the engine compartment is pretty tight in there, so heat dissipation is not optimal. IN that regard, I would suspect that the 300SL probably runs a bit cooler...
2009 ML350 (84K) - Family vehicle
2001 CLK430 Cabriolet (71K) - Wife's car
2005 BMW 645CI (124K) - My daily driver
2012 Mustang V6 (60K) - Daughter's car