I bought a thermostat at an auto parts store for an 87 300SDL which is rated for 85C (Wahler #MER 601 200 00 15). I checked Performance Products catalog which indicates to use an 80C thermostat.
I called the parts store to verify temperature rating and they inform me that Mercedes indicates 82-85C as thermostat for this car. What temperature rating should I use? Thanks for the help.

Roman

87 300SDL 145K
86 300SDL 210K
83 300D 220K
81 300D 140K