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Matt
Matt, Mechanical Engineer
Category: Mercedes
Satisfied Customers: 21993
Experience:  BEng hons Mech engineering, in auto industry 22 years
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just changed the oil cooler on a 320cdi rclass car was running

Resolved Question:

just changed the oil cooler on a 320cdi rclass car was running but now it wont start it turns over and tries to start took off hose out of filter and it is spurting out when cranking it over
Submitted: 2 years ago.
Category: Mercedes
Expert:  Matt replied 2 years ago.
Hello

its likely that the ECU isn't opening the fuel injectors, if the injectors are working you can hear them click - its difficult to hear them with background noise so use a long screwdriver like a stethoscope, placing the handle end in your ear and the metal tip against the body of the injector whilst your assistant turns the engine over.

If you can't hear anything check the ECU power is present by measuring voltage at the fusebox and on its relay socket if OK then check the connections to the crank speed sensor and consider replacing this sensor if the wiring / connections look OK

If the car will start using a squirt of quick/ easi start into the intake then this confirms the problem is lack of fuel

Also its worth checking that the electric pump that feeds the injectors is working correctly, it should run for a few seconds then switch off when you first turn the ignition on. If you remove the filler cap to the fuel tank and listen inside while your assistant flicks the ignition you should hear it clearly

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