I'd go with the above suggestion. Take the car for a run after the therm opens, shut the car down, and feel as much of the radiator fin suface as you can reach. Every spot you touch should be uncomfortably warm. There should be no cold spots. If you live in a state that checks for NOX, there is speculation that a restricted radiator will seriously ellevate NOX readings also. Unlike Hondas and some other brands deteriorated water pump vanes are not a problem with MBs.

Peter

__________________
Auto Zentral Ltd.