White Smoke usually is the burning of engine oil. The O2 sensor is usually plug into the enhaust half way out. So I wonder if its the O2 sensor causing white smoke. How do you know it comes from the O2?

Also the OVP connectors are like the wiring harness, power connectors, have a look at them and they should be able to be tightened. Should just be time consuming and dex fingers.

Hope it helps.

__________________
1992 200E
M102
102.963
AKA Silver Old Grumpy
Always hope I can freeze someone with the aircon- Just change the compressor again, Subseal leaked with a psssssssss sound.
Its the NON-3 Pointed star items on my car that cost more to repair.$%^&%%*^&