Have some info on the L5 sensor (as it's called in my car). Check my page (www house) and click menu #5.
If bad, the CE light is turned on immediately. With an ohmeter, a good one ohms out to 850 ohm +/- 5%. Also it should be shielded since the signal needs to stay "clean" getting to the DI module. If broken as your is, it needs to be replaced or fixed so that the shield is 'integral' to unit. Best to replace it.
Regards . . . . JimF
'94 S500 Cpe
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