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Old 06-14-2016, 07:43 PM   #1
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Join Date: Jun 2016
Posts: 1
DEF system shut down on new Solara MB

My wife and I were driving up to Seattle from LA and our DEF light came on plus another check engine light. Called Mercedes Benz and they were very helpful and told us not to turn off the motor because you only get so many starts after that happens. Has any one else had this happen? Now the tank has to be flushed. Would love any feedback! We have a 2015 Solara ....
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Old 06-14-2016, 08:05 PM   #2
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Join Date: Oct 2014
Location: North Georgia
Posts: 1,945
First, welcome to the forum. I suggest you re-post your issue in the Solera or Mercedes Benz Sprinter Chassis forums and you will probably get more responses.

Regarding the DEF issue. I had it happen twice with our 2016 Sunseeker MBS, which is basically a renamed Solera. When you go into "countdown mode", due to DEF issues, you can only restart the motor 10 times if I recall correctly. You should see a warning of StArts REXX in your dash display. The XX is restarts remaining. You need to get to a Sprinter repair center.

We had two major failures of the DEF system on our MBS. The first required several parts to be replaced in the DEF system. That was 3 weeks in the shop waiting for parts. The second round was a bad DEF injector that was a week in the shop. DEF issues can be a real pain in the rear. They chased us in to a 2017 GTS with a Ford chassis....
Wayne and Christine
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