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

People remember older diesels with great fondness.   They’ve forgotten about the black soot & the smell.    What they remember most, was their dependability & fuel economy.    Those days are long gone & new diesels are nothing like their grandfathers.   Clean diesel technology is anything but simple.   You have no […]

HELP… I put gas in my diesel!

Sometimes owners make the mistake of putting gas in their diesel.    A number of owners have told me their dealer charged them $20000 to fix the fuel system.   Dealers even replace the fuel tank.   This is outrageous.
There are several ways of dealing with this problem & spending $20000 is not one […]

Oil related engine failures

Mercedes-Benz has dozens of service bulletins about major engine failures.   I can post them, because they are copyrighted.   Mercedes makes them hard for customers to find, because they are posted in a subscription only technical website, www.startecinfo.com.   It cost $60 just to log-in one time, so most customers won’t do this.   The bulletins […]

Breaking-in a new BlueTec diesel

If the OM642 or OM651 had started life with Break-in oil, it would have made a big difference.   The piston rings in a BlueTec diesel need to be perfectly mated to the cylinder walls.    Why…. because diesel engines run with a much higher compression ratio than a gas engine.    Piston rings […]


Over the years, people have repeatedly told us they think it would be cheaper for them to buy a new car rather than spend the money it takes to maintain or repair their current car.  We know people struggle with seeing the benefits of preventive maintenance.  What gets people into trouble in the […]

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 […]