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Old 08-22-2007, 07:42 AM
ctaylor738 ctaylor738 is offline
Super Moderator
Join Date: Apr 2000
Location: Falls Church, VA
Posts: 5,316
Well, then you have more than one problem. My 560 has never gone much over 80 in traffic even on 95 degree days.

Suggest you check your thermostat, radiator (is it hot at top and cool at bottom?), the cap on the tank, too much antifreeze in coolant mix, air in system, and viscous fan coupling to get a handle on the basic overheating problem, .

Then you need to find out why the aux fan is not coming on. Temp sensor, fan relay, or the fan itself.

Lots of posts on these problems. Sorry it's not a quick fix.
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe
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