View Full Version : 2015 crew tank boom

03-09-2016, 07:21 PM
Hello everyone,
Nice to be here and would like to know if anyone has experienced a big boom or pop noise under your sprinter just after startup? Sometimes as many as 4.
Sounds to me like a tank popping to the effect of temperature change or a vacuum release.
I am not familiar with the sprinter at all and the diesel is my first.
I thought it could be a fuel cap not venting but no suction there when removing.
Could it be a vacuum tank related to the DEF?
It is puzzling to have such a loud boom noise while idling in a one year old van.
Any input will be appreciated.
Thanks Spoke
Talked to Mercedes today service said never heard of it but that fuel tank was under pressure and I would have to bring it in and make the noise for them to try to understand the source.
This is going to be a long journey filled with BS. I have found that the dealers always miss diagnose just about everything.

03-09-2016, 09:05 PM
Doesn't sound right to me.