[R129 SL] 300 SL

[Cliff Sadler]

I'm having a similar problem, and ran across this info from the archives:

Stumble problem after warmed up

I have a '91 500sl with 71k mi. The car has been maintained well during
its life. I live in Va Beach, Va at sea level.  The car runs great when cold
but after driving 15-30
min., the car will stumble and hesitate on acceleration  as if a
cylinder or 2 is not firing, especially in warm weather. I went to the
mountains (3500 ft above sea level) and experienced no
trouble even when hammering it out on winding mountain roads. It thrived
on climbing the 9% grades.
    I took it to the dealer and they could not replicate the problem but
replaced the distributer cap and rotor. They said it was running fine
and passed all computer checks. I dont think they let it warm up enough.
This did not solve the problem. The plugs are new and I just replaced the
Oxygen sensor. Any ideas? I was
thinking about replacing the fuel injectors.



Try this,     replace your fuel tank gas cap with a new 'Stant'  gas
cap.
I was having same type problems, and the
difference was amazing,   something to do with proper tank and injector
pressures.     cost  5.oo
I am convinced that a tune up consists
of, cleaned battery cables, ,new plugs,  distributor cap and rotor and a
new gas cap (something that is almost never changed)     Let us know if
it works.

-----Original Message-----
From: r129list-admin@mbcoupes.com [mailto:r129list-admin@mbcoupes.com]On
Behalf Of Adam Gage
Sent: Thursday, July 17, 2003 7:16 PM
To: r129list@mbcoupes.com
Subject: Re: [R129 SL] 300 SL


Don't know if the car starts off in first, probably in second, but I don't
think it's a tranny problem.  There's a definite hesitation, like it's
choking, and then it flys forward after stepping on the gas.  This only
happens when the AC is on and I've been driving the car for awhile.  I'm a
little hesitant to take it to a dealer so they can "experiment" - nearest
one is in San Deigo or Phoenix.  Any recommendations for a dealer if anyone
has had this problem?

Thanks list!
Adam
(P.S. this list is great for info when there's no one to ask!)
----- Original Message -----
From: <Alvamike@aol.com>
To: <r129list@mbcoupes.com>
Sent: Monday, July 14, 2003 4:57 AM
Subject: Re: [R129 SL] 300 SL


> Adam and all,
> Is the car supposed to START off in 1st??  I think I figured out the
problem with the shifting.  I found the rubber cover over the vacuum
modulator was very cracked.  I replaced it and it shifts 1000%
better......but it starts in 1st.  Is this right??  Runs great !!!!
> Mike in Morgantown, PA
>
> The MB Coupes Website!
> R129 SL Mailing List
>



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