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Fuel mixture is way too rich. Some possible causes are:
1. Faulty fuel pressure regulator causing fuel rail to run at excess pressure (should be about 2 Bar or 30 PSI). A check of fuel rail pressure would verify this.
2. Faulty cold start injector constantly injecting fuel. Remove cold start injector and switch on ignition (do not start) to see if injector is leaking fuel.
3. Faulty coolant temperature sensor. Measure resistance value and confirm that this agrees with values stated in workshop manual.
4. Faulty manifold pressure sensor. Difficult to test other than by sustitution.
5. Faulty ECU. Difficult to test. One possible test is to listen for injectors "clicking" while the engine runs. This is difficult in your case since you can only get engine to run for a short time. With ignition on but engine not started, you should hear the injectors "click" as the throttle is slowly opened.
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107.023: 350SLC, 3-speed auto, icon gold, parchment MBtex (sold 2012 after 29 years ownership).
107.026: 500SLC, 4-speed auto, thistle green, green velour.
124.090: 300TE, 4-speed auto, arctic white, cream-beige MBtex.
201.028: 190E 2.3 Sportline, 5-speed manual, arctic white, blue leather.
201.028: 190E 2.3, 4-speed auto, blue-black, grey MBtex.
201.034: 190E 2.3-16, 5-speed manual, blue-black, black leather.
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