R350 regular RPM to high RPM autometicaly
Its 2012 Mercedes R350 blue tech turbo diesel engine. My car runs good when it's cold, after driving a while it takes higher RPM to shift the gear. Regular gear shift is RPM 1.5 and when it's get in to that problem it's 2.5.
Mostly I face this issue when I go under 15 mph or stop my car. If its in normal condition I can drive 50 miles without any problem at 60 mph but as soon as I slow down or stop it get's back to higher RPM mode.
Please please please help. I have checked with couple mechanics but they didn't fixed the problem.
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