what would make the oil to get on # 3 plugs on a 02 c320 benz

Asked by Jul 22, 2013 at 08:17 AM about the Mercedes-Benz C-Class

Question type: Maintenance & Repair

3 Answers


Which part of the plug? if its the top then it could be a bad valve cover gasket, if its the bottom of the plug it could be much difficult to determin. Bottom of the plu could mean bad rings, ect.


Are you sure it's oil and not just an old blackened plug wiv a bit of unburnt fuel?


If the oil is on the outside of the plug , then it could be the valve cover gasket. Simple fix. either tighten the valve cover bolts (normally after awhile when the gasket gets hard and brittle they shrink and you may need to torque down the valve cover to stop any little leaks that may start) wost case you buy a new valve cover gasket. Now, if you are detecting oil on the plug when you take the plug out and inspect the tip, you have a more serious problem. Does the car spew white smoke when you accelerate? Then, an engine rebuild is in order.

Your Answer


Looking for a Used C-Class in your area?

CarGurus has 25,311 nationwide C-Class listings starting at $1,950.


Mercedes-Benz C-Class Experts

  • #1
    Lorne Grandison
  • #2
  • #3
View All

Related Models For Sale

Used Mercedes-Benz E-Class
427 Great Deals out of 20,627 listings starting at $1,999
Used BMW 3 Series
901 Great Deals out of 32,980 listings starting at $1,300
Used Mercedes-Benz CLA-Class
162 Great Deals out of 6,437 listings starting at $14,991
Used Mercedes-Benz S-Class
120 Great Deals out of 7,156 listings starting at $1,980
Used Mercedes-Benz CLS-Class
45 Great Deals out of 2,155 listings starting at $6,000
Used BMW 5 Series
387 Great Deals out of 15,995 listings starting at $1,650
Used Audi A4
188 Great Deals out of 12,349 listings starting at $1,700
Used BMW M3
25 Great Deals out of 1,731 listings starting at $5,495
Used Mercedes-Benz CL-Class
18 Great Deals out of 511 listings starting at $4,000
Used Ford Mustang
287 Great Deals out of 38,472 listings starting at $1,995
Used Honda Accord
553 Great Deals out of 91,963 listings starting at $1,495
Used BMW 4 Series
268 Great Deals out of 9,881 listings starting at $15,989
Used Chevrolet Camaro
245 Great Deals out of 30,155 listings starting at $4,980
Used Mercedes-Benz M-Class
258 Great Deals out of 5,980 listings starting at $1,995
Used Dodge Charger
247 Great Deals out of 33,171 listings starting at $495

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.