2010 Mercedes-Benz GL350 BLUETEC 4MATIC Questions

All 2010 Mercedes-Benz GL350 BLUETEC 4MATIC Questions

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After washing my car GLK350, I have lost the power on the dashboard, as well as the signals and the functions bottom on the steering wheel. Please advise and thank you
Dealership said it's the oil cooler. They replaced easily accessible gaskets. It still leaked. Now to replace oil cooler is $4,000 and/or repair the O rings . Insurance company won't cover unless it was directly c...