Vid helps a lot:

http://www.youtube.com/watch?v=vRAV5ln5cUc

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1991 560 SEL / 185k miles
1992 750il / 17k miles - project car

I'm going to give that a go next time. Thanks!

im having the same issue with cold starting,it chucks and will not run right untill almost fully warmed up close to the 80 celcius mark,whats this so called seafoam,where do you get it and how much is it,i regularly run lucas fuel injector cleaner and upper cylinder lube,its apparently not working.

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enjoy life,take the coal that is handed to you and turn it into diamonds. { PHILLIPIANS 4:13}

you can get seafoam at most autoparts stores.....even at walmart. its under $10.
Safely frees sticky lifters and piston rings, removes carbon build-up and oil residue, reduces pinging and rough idle. For Carbureted or Fuel Injected Gasoline Engines - Autos – Trucks – Tractors – Motorcycles – Marine – Small Engines – Industrial Engines Great for Diesel Engines Too!
SEA FOAM Motor Treatment is a 100% pure petroleum product that safely and effectively cleans internal fuel and oil system components, helping your gasoline or diesel engine run cleaner and more efficiently. SEA FOAM is an EPA-registered product, and will not harm engine components, seals, gaskets, catalytic converters or oxygen sensors.
SEA FOAM liquefies gum and varnish deposits or internal engine contaminents, removing carbon deposits, freeing sticky valve lifters and rings curing rough idle, pinging and hesitation problems. By using SEA FOAM to eliminate varnish and carbon buildup, mechanics can more accurately diagnose mechanical problems that may exist. That is why Sea Foam has been so popular with professional mechanics for over 65 years.
As a fuel system additive, Sea Foam will clean fuel injectors, clean carbon, gum and varnish deposits, add lubricity to fuel, stabilize fuel for 2 years and control moisture.
As an oil system additive, Sea Foam controls moisture, gum, varnish and residue deposits.

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1990 190E 3.0L

I use Marvel Mystery Oil every time I fill up. I see better fuel economy in my '88 300E because of it. I would say 1-2 MPG better on average, which is great considering I'm running 93 Octane fuel.

Well, I also went ahead and replaced the cold start injector valve today to see if this helps the car start and get up to normal idle even quicker. Will post back as this is one of the things lots of members have recommended changing and it has been getting down into the low 30s here lately.

How did it go with the cold start injector valve? easy to replace? I have the same issue, (these last couple of weeks of cold weather really have impacted my vehicle).

last year I used 44k, but this year due to limited budget used seafoam in the last tank (current) and it has made a bit of difference (still working on an issue - diff post).

I only use premium gas, but used to only use shell premium and now that they closed the one closest to me, I have been using chevron premium gas for the last year or so.

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89 300E - 240k +

Curious question--does Techron have a shelf life?? I ran across a sealed bottle in the garage the other day, has to be from late 2003-early 2004. Okay to use in my car or should i use it as fire starter??

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Earl McLain
'02 C230 Kompressor
'89 560 SEL "Frau BlueCar" (retired April 2004)

btw, a new wireset/sparkplug/seafoam seems to have fixed my start up issue (then again weather has improved a bit too). I will also replace the dist cap/rotor.

@greenacres2 - I don't know but since seafoam is about $10, personally I would not use the 2003-2004 bottle, I would just get a new can of seafoam or get the 44k from the dealer (44k was $24 for one can).

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89 300E - 240k +