If you look around, you may find sensors considerably less-expensive than the "universal." I have not tried this with 4-wire sensors, but for the single-wire type used on 380's and 560's, I used a sensor for a '90 Mustang. IIRC, the universal were like $35, and the Mustang less than $20. You just cut the end off and supply your own connectors and heat shrink.

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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