Quote:
Originally Posted by turbozeke418
No I haven't. Only reason is because after one cycle the car fires up instantly and effortlessly. You can tell when the relay kicks off and they are no longer heating. If one wasn't working it would be hard to start. At least that's my past dealings with the W123 and W126 I've had in the past when one went bad.
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You need to check the GPs. Unlike the 123, this car has afterglow so once the engine fires up, it relights GPs. That's why it fires up so easily. Its an easy job by checking the resistance at the gp relay plug.
Also you have OBD2. If there is a GP relay fault there will be a stored pending code.
If there is air in the system, the problem would manifest itself all the time, not just cold start so that hypothesis is dead wrong. If there is air in the system that can be easily diagnosed by checking for air bubbles traveling through the clear fuel lines. Don't start trying to diagnose the problem by replacing unnecessary parts.