Well, they are not the same.

The SLC shows 107 042 07 04, and the SL is 00 and 04 in the third position depending on the VIN. Whether it will work is a matter for experiment. If it's the same design, it will probably work electrically, but read incorrectly maybe because the tubes are a different length.

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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