95 s500 exhaust smells sulphur

[ramco18]

I am a frequent visitor of this great site and I thank all of you for your time and dedication to discuss MB cars.

I have this problem with my car, 1995 s500 (mileage 37400) where the exhaust smoke occassionaly smells like sulphur.
I use Sunoco Super or Shell Super gasoline.

Dealer has changed the following:
Catalytic converter
Air flow valve/sensor
Engine timing parts
One injector
o2 sensor
Remaining 7 injectors.

All above done around 27,000 miles. After above replacements Car had no problem for about six months. Now the problem seems to reoccuring. Is this a known problem on 1995 s500's?

Dealer has been very co-operative(starmark car), but its a nuisance to take the car back so often, it takes them one day to diagnose, order the part and install on third day!!!!!!

Any suggestion about the cause/remedy will be helpful.
I thank you for your valuable contribution

Ramco18

I do too smell sulphur ocasionally esp.after a
spirited run.I asked the dealer,and they said
its normal.The car just passed emission and
run,idle,accellerate smoothly.It is most likely
the sulphur content of the brand of gasoline you
(or we)are using.They added.Why all the parts?
Is your car acting bad?

[ramco18]

Why Parts?

First they changed the catalytic converter to solve the problem of sulphur smell in the exhaust, after few days problem was back, so they changed the
air flow sensor, problem persists so engine timing, problem persists etc..etc...

In short the car went back 7 times for the same problem of bad exhaust smell, ( I wonder what is the lemon law for used car?)

Problem went away for about six months, but is back now occassionally.

[Ashman]

Try clicking search and try searching sulfur, see what you come up with...

http://www.peachparts.com/shopforum/search.php?action=showresults&searchid=45645&sortby=lastpost&sortorder=descending

Alon

Guys,
I found the the search word."Rotten Egg Smell"
Theres a bunch of discussion about sulpur.

[ramco18]

Thank you all for your help,
Search under " Rotten egg smell" gives useful information.

I guess I will have to check the o2 sensor again....

Ramco18