1966 250SE Stalling Issue - Mercedes-Benz Forum

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post #1 of 3 (permalink) Old 06-08-2016, 04:08 PM Thread Starter
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Date registered: Jun 2012
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1966 250SE Stalling Issue

Hey Guys,

I recent purchased a 1966 250SE with the M129 engine.

A buddy of mine is a mechanic and has been helping me bring the girl back to it's original state mechanically.

So far we have replaced:

Spark plugs with NKG plugs
Spark plug wires
Distro cap and rotor
Fuel filter
Intake filter

Performed an oil change

When the car is cold it runs and idles like a champ, however once the car warms up it sputters and stalls out.

I took the car for a drive and after about 10-15mins of driving I lost all power from the engine, she stalled and didn't want to turn over.

Any ideas what could be causing the problem?
Areas to look into next and possibly replace/clean?

Any tips would be appreciated


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post #2 of 3 (permalink) Old 06-14-2016, 08:31 AM
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Date registered: May 2006
Vehicle: 2000 ML320, 2005C240 4matic wagon, 1962 220SEb, 2002 CLK55 Cabrio, 2014 C300 4matic, 2000 CLK55
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It is difficult to diagnose without more information such as compression readings, spark plug color, battery voltage etc.
Just guessing it could range from battery/charging system to valve adjustment, ignition system, fuel pressure issue with either pump, pump relay or regulator.
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post #3 of 3 (permalink) Old 06-15-2016, 03:48 AM
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Vehicle: 1967 250SE (W108)
Location: Michigan
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As noted, you need to provide more info. When you say it "didn't want to turn over" do you mean it doesn't crank or is it cranking but won't start?
Not cranking would lead me to look at electrical where as cranking but not firing could be no fuel.
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