i have a 94 e420 the temp hands is starting to go up when iam setting still the fan on the left does not come on but the one on the left does come on when the temp gets real high. i can spin the fan an it acts like it wants to work but it will not run any sugestions an could the thermal stat is going bad havent changed it out in 4 years. also would the o2 sensor make your car miss an give you the that raw gas smell from the tail pipe