Mercedes-Benz & Sprinter OM642 BlueTec Diesel Issues/Problems

This article is about the Mercedes-Benz BlueTec diesel. I originally wrote it to help my local customers better understand BlueTec diesel issues, problems and preventive maintenance. After 50 years with Mercedes-Benz I retired last year. This article is strictly my opinion. I don’t have any connection to Mercedes-Benz or their dealers. Most people find […]

HELP… I put gas in my diesel!

What to do if you’ve put gasoline in your diesel.

Note:  Normally gasoline will ruin a diesel High Pressure Fuel Pump (HPFP).

Models effected: All year models of OM612, OM642, OM647 and OM651 diesel engines.

The following procedure should be followed when the above model diesel powered vehicles with a common rail injection system have been refueled […]

BlueTec Diesel Oil

I need to rewrite this article about BlueTec diesel oil.  I get so many calls about what’s the best oil, that I haven’t had time.  I normally have to think about what I’ll say, because everybody and their Mother gets twisted.  For the moment, I’ll be blunt.  Mercedes is using a Gasoline engine oil […]

Breaking-in a new BlueTec diesel

It’s to bad Mercedes-Benz didn’t use Break-in oil in their BlueTec diesels.   If they had, the piston rings would have formed a perfect seal with the cylinder walls.  BlueTec diesel’s run much higher compression than earlier diesels or gas engines.  BlueTec diesel’s have abnormally high levels of fuel dilution.  Piston rings with the […]

Diesel Particulate Filters and Catalytic Converters

How fragile is the DPF and Catalytic Converter?
DPFs and Catalytic Converters have been around for decades.  When it comes to the final cleanup of what goes out the tail pipe the DPF and Catalytic Converters do the heavy lifting.

For years the EPA has passed all sorts of regulations to make their lives easier.  One […]

Battery Advice

If you have a dead battery, you’ll want to use a genuine Mercedes-Benz battery. Aftermarket batteries don’t have enough amperage and cause low voltage fault codes when the system is under peak loads. Low voltage confuses the control modules and causes a host of problems that just end up costing you far more then you could ever […]

When did you first learn the value of a good mechanic?

Typically our first contact with a new customer is after they’ve seen a maintenance message in their Instrument Cluster. People want to know what it means & what it will cost. No matter
how closely you read you Owners Booklet, you’ll not find a explanation. That’s because Mercedes-Benz never explained the meanings of the different […]