About stephensservice

tochwat@gmail.com - Tad Ochwat (This is the person that helped us set up the account. He still has authority to log in and do whatever he may need to do. He has gotten out of the business & we don't see him as often as we did. If we get in trouble, he is still OK to fix things. The site is owned by Tom Stephens, cell 916.715.0665)

Mercedes-Benz & Sprinter OM642 BlueTec Diesel Issues/Problems

Most people will find this article after they’ve had some major problem with their Mercedes-Benz BlueTec diesel. I also get a lot of calls from people shortly before or after they buy a new Sprinter for their business or as a RV. BlueTec diesels have been around long enough for most interested […]

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

The oil in a BlueTec diesel is much more complicated than the oil in a gas engine.  When the DPF fills with soot from the exhaust it needs to regenerate every so often to burn off the soot.  All of the extra heat and fuel dilution in a BlueTec diesel causes the engine to […]

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 […]