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Super Moderator
1966 Crown Coupe, 2016 200 S AWD, 1962 Lark Daytona V8.
22,977 Posts
Welcome to Allpar. What was the fault code?
ULSD (ultra low sulfur diesel) is a must for these engines as is the special HDEO engine oil. The owners manual should tell you what specs and classifications to look for.
Fuel related soot and carbon build-up is a problem for any turbo-diesel. Mercedes-Benz builds complex and expensive machines, but the Ram Cummins diesels have the same issues.
There are turbocharger cleaning chemicals and procedures that technicians use at the dealer to head off major upper engine work.
You might consider this 'cleaning' a periodic service. There is a PCM software update to improve cold and warm hard starting. It may already have this flash. You always want the latest and greatest software installed.
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