Mike,

Your thermostat is probably sticking. There's a little arm on the t-stat which catches on the housing and causes the immediate temperature increase then decrease to normal. Solution is to replace the t-stat and either file the housing a little or cut the arm off the new thermostat. That oughtta take care of your problem!


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Rgds,
Aaron Greenberg
MB technician
Precision Motorcars, Cincinnati, Ohio
'67 250SE Cabriolet
'77 450SL
'80 300SD
'85 380SE
'89 420SEL
'93 300E 2.8
'74 Jensen Interceptor Mk.III
'81 DeLorean DMC12
'85 BMW 745i Turbo