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Mercedes Benz
300SE
Repair Questions and Answers
Question: 1991 Mercedes Benz 300SE
3.0 I6 mileage: 113K. The car idles fairly smooth, but
when put in gear the idle becomes quite rough. I have
performed maintenance of all filters, plugs, and oil
change. I have not changed the plug wires (they appear
to be original) the plugs are not discolored and seem to
be firing correctly when checked with a timing light.
The wires are expensive so would prefer not to change
them if not needed. The car runs well at speed but am
afraid the roughness is being masked by the increased
Rpms. This problem is not always present, but I have
been unable to determine a pattern. We have been using
93-octane gas as recommended. We recently purchased this
car so do not know the history of this problem. Steve
Answer: Do a compression check
first. The plug wires can be checked by observing the
running engine in very low light "night time" and watch
for arcing. If they are arcing, replace them and your
problem should be solved.
Question:
1985 Mercedes Benz 300 SE V-6 mileage: 79,000.
There was a question similar to this one. I don't
have problems starting the car, but twice now, it has
stalled while driving. It stalled when my foot was
off the gas, while coasting. I took it in last
time for a tune-up, all they found were some corroded
wire-but then it stalled again today. The car has
been pretty well maintained by the previous owner and
me. What could be the problem?
Answer:
Your stalling problem may be cause by the fuel pump.
Replacing it and the fuel filter should fix your
problem.
Question:
1985 Mercedes Benz 300 SE mileage: 79,000. There
was a question similar to this one. I don't have
problems starting the car, but twice now, it has stalled
while driving. It stalled when my foot was off the
gas, while coasting. I took it in last time for a
tune-up, all they found were some corroded wire-but then
it stalled again today. The car has been pretty
well maintained by the previous owner and me. What
could be the problem?
Answer:
Your stalling problem may be cause by the fuel pump.
Replacing it and the fuel filter should fix your
problem.
Automobile
/ Mercedes
Benz / 300SE
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