First I'd like to say as a presumed non-native speaker, your english is perfect.

W140's are notorious for leaking a/c evaporators, so that might be one thing to check out.

Regarding your alleged missing problem, check to see if you are running the proper non-resistor, copper core plugs. The resistance in this ignition system is in the spark plug boot, so running resistor plugs is not recommended.

Also check the condition of your distributor cap and rotor.

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Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".

Thanks - although it may have something to do with the fact that I spent more than five years as a child living in the UK.


I have read about this many times. The system will get a full test on Wednesday - maybe I will not need to have the evaporator replaced...

Thanks - I was not aware of this. During its entire life to date, the car has been serviced by two official Mercedes dealers, so I would assume the spark plugs should be of the correct type.

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Mateusz
1986 126 500SEL
1986 126 300SE
1992 140 500SE
1996 124 E200T
1999 210 E320T
2017 205 C200T mit Schaltgetriebe!
2010 639 CDI 3.0
2008 204 C180 KOMPRESSOR