Got a new thermostat on hand. Will be doing a coolant change soon. Wonder if I ought to change the thermostat now or just hang onto it and use it when the time arrives. Have no idea how old the one in the car is - it could even be original. The car stays at a rock solid 82°. This is the SL I"m talking about.

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Len
'59 220S Cabriolet-SOLD and living happily in Malta
'83 240D 351,500 miles original owner-SOLD
'88 560SL 41,000 miles - totaled and parted out
https://sites.google.com/site/mercedesstuff/home
'99 E300 turbo 227,500 miles
'03 SLK320 40,000 miles - gave to my daughter
'14 Smart electric coupe 28,500 miles
'14 Smart electric cabriolet 28,500 miles
'15 Smart electric coupe 28,000 miles