matsice38

Mercedes GLK AdBlue Issue and Engine Won't Start

My 2015 Mercedes GLK diesel is acting up The dashboard says the AdBlue tank is empty, but it's full The error is stored, and the engine won't start Is this an emissions control issue, perhaps the DEF fluid injection system Could the AdBlue output to the dosing unit be defective Has anyone else seen this

4 comment(s)

That sounds frustrating I had a similar issue with my Mercedes Same symptoms: dashboard alert, engine refusing to start It's likely the AdBlue delivery system Could be a faulty sensor or the pump itself Have you checked for any visible leaks around the tank or lines

Thanks for the reply I don't see any visible leaks When you say 'the AdBlue delivery system,' are you talking about the pump that sends the DEF fluid to the injection system Is there a way to test that without special tools

Yes, I meant the pump and all the lines Honestly, without proper diagnostic equipment, it's tough to pinpoint the exact cause In my case, it ended up being a faulty pump I'd recommend taking it to a workshop with someone who knows these systems well It could save you a lot of headache and wasted money The repair cost me around 250€

Thanks so much for your help I took it to a workshop You were right; it was the pump They replaced it, cleared the error codes, and now it's running great I appreciate the advice

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