I agree with the accumulator for the hot start issue.

I think your oxygen sensor may be TU. If you can't get it below .7, then the lambda system or EHA (not sure what a '92 CE has) is going to lean the mixture as much as possible based on a false reading. So get the proper (3 wire?) generic Bosch sensor from Phil for $35 or so, then adjust your on/off ratio as described in many posts.

__________________
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