Mercedes-Benz R320 Engine is misfiring Inspection at your home or office.

Our certified mobile mechanics come to you 7 days a week between 7 AM and 9 PM.

Estimate price near me

Service Location

Customer Ratings

(6)

How A Diagnostic Works

Instantly book a certified mobile mechanic to come to you

Mechanic diagnoses the problem and quotes necessary repairs

Your vehicle is ready to go

Fair, upfront & transparent pricing for all services

Our certified mobile mechanics can come to you now.

Customer Ratings

(6)

Engine is misfiring Inspection Service

How much does a Engine is misfiring Inspection cost?

On average, the cost for a Mercedes-Benz R320 Engine is misfiring Inspection is $95 with $0 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2007 Mercedes-Benz R320V6-3.0L Turbo DieselService typeEngine is misfiring InspectionEstimate$114.99Shop/Dealer Price$132.49 - $145.62
2008 Mercedes-Benz R320V6-3.0L Turbo DieselService typeEngine is misfiring InspectionEstimate$94.99Shop/Dealer Price$112.52 - $125.67
2009 Mercedes-Benz R320V6-3.0L Turbo DieselService typeEngine is misfiring InspectionEstimate$94.99Shop/Dealer Price$112.52 - $125.67
Show example Mercedes-Benz R320 Engine is misfiring Inspection prices

When an engines misfires, it’s usually readily apparent to the driver from the stuttering and jerking produced by the engine when one or more cylinders fails to fire properly, either because of ignition- or fuel-related issues. It is accompanied by a loss of power in direct proportion to the severity of the misfire.

It can be tricky for to track down the problem if the misfire only occurs under certain circumstances, for example, under load. Not all misfires occur across the operating spectrum.

For older vehicles:

On older, carbureted vehicles, the culprit will almost certainly be in the ignition system as older vehicles lack many of the sophisticated sensors that can cause a misfire. A vacuum leak or a faulty fuel pump can also cause this symptom as well. The first thing the mechanic will do is determine which cylinder or cylinders is misfiring, and the spark plug color is probably the best way to tell. The guilty plug will most likely be grayer than the others, which should tend toward brown coloring. If needed, the spark plug can be replaced.

The next step would be checking the wiring to that plug for cracks and deterioration, and replace as necessary.

For most modern vehicles:

In modern cars, misfiring will invariably be accompanied by a Check Engine light. In fact, checking for efficient combustion was the primary reason the U.S. government introduced the rules for OBD-II (on-board diagnostics, second generation). It was part of the push toward cleaner exhaust emissions.

A code reader will tell you which cylinder is to blame, but it may not say whether it is a problem relating to the injector serving that cylinder or the systems delivering the ignition spark. As with older vehicles, a look at the wires and spark plugs is a good idea. Checking them in the dark will sometimes reveal errant spark tracking, as will spraying them with a fine water mist.

One way mechanics check which spark plug is failing to hold its own is by running the engine at an idle speed high enough to produce the misfire, then removing leads from the coilpack (the unit that looks like the distributor we are used to seeing in older vehicles ) one by one. Most removals will cause a profound change in idling performance, but a defective wire will not. That will suggest that it’s either the spark plug or the coil serving that cylinder at fault. If a new spark plug at that cylinder does not remove the stumble, the mechanic may need to replace the coil pack or the wires as a set.

If it isn’t an ignition issue, then the injectors will need to be checked. A mechanic uses a multimeter to check the resistance value at each injector. It may be a bit difficult to reach them, sometimes requiring the removal of an engine cover and the intake manifold. The mechanic disconnects the injector, then touches the multimeter probes to the two connector prongs to read the value, in Ohms. If any of the injectors read outside of the specified values, they will need to be replaced.

Along the same lines, a fuel pump starting to go bad can also cause misfires or similar issues and can be diagnosed with a fuel pressure check of the entire system with the appropriate equipment. This should only be done by a qualified mechanic as the fuel system is highly pressurized and of course, fuel is flammable.

Common reasons for this to happen:

  • Faulty spark plugs or wires
  • Faulty ignition coil
  • Broken piston rings
  • Burnt or bent valves
  • Broken valve springs
  • Camshaft worn out
  • Fuel injector is not working

What to expect:

A top-rated mobile mechanic will come to your home or office to determine the source and cause of the misfiring engine, and will then provide a detailed inspection report that includes the scope and cost of the necessary repairs.

How important is this service?

A misfiring engine is accompanied by a loss of power, which makes this issue a critical one to correct promptly. Book a mechanic to perform a thorough inspection as soon as possible.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert Mercedes-Benz mechanics

Real customer reviews from Mercedes-Benz owners like you.

Excellent Rating

(6)

Rating Summary
5
0
0
0
1
5
0
0
0
1

Ben

41 years of experience
1426 reviews
Ben
41 years of experience
Mercedes-Benz R320 V6-3.0L Turbo Diesel - Oil Change - Katy, Texas

Tung

16 years of experience
310 reviews
Tung
16 years of experience
Mercedes-Benz R320 V6-3.0L Turbo Diesel - Exhaust Gas Recirculation (EGR) Tube - Marietta, Georgia
Tung worked hard and got the job done! Highly recommended.

Chris

16 years of experience
331 reviews
Chris
16 years of experience
Mercedes-Benz R320 V6-3.0L Turbo Diesel - Serpentine/Drive Belt - Spring Valley, California
Friendly

Terry

30 years of experience
223 reviews
Terry
30 years of experience
Mercedes-Benz C230 V6-2.5L - Engine is misfiring - Mesa, Arizona
I was great to have someone who knew what he was talking about and not there to rip me off.

Excellent Rating

(6)

Rating Summary
5
0
0
0
1
5
0
0
0
1
Number of Mercedes-Benz Engine is misfiring Inspection services completed
66+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1100+
experts on our platform

Recent articles & questions

How Does Adjustable Suspension Work?
Every Every vehicle’s suspension — the collection of parts that supports it, cushions its load from bumps, and enables it to turn — represents a compromise by the designers. Automakers must consider numerous factors in design any vehicle’s suspension, including:...
How to Replace a Lost or Stolen Car Title in Nevada
With With so many papers, forms, and cards to keep track of it's only natural that we lose items from time to time. If that lost item happens to be your car title then obviously you've got a bigger issue...
P2121 OBD-II Trouble Code: Throttle/Pedal Position Sensor/Switch D Circuit Range/Performance
P2121 means there is a problem with a particular throttle position sensor circuit

Wheel locked

Try turning the wheel back and forth while turning the key, use caution not to break the key. If you still cannot get the key to turn, you may have to have the ignition lock cylinder replaced. A certified technician,...

Car won't start and won't even crank when I turn the key.

You will need to see if you can put a socket on the front crankshaft pulley bolt and turn the motor by hand to see if the engine is free to turn over. Check the oil to see if it...

The thermostat has been replaced in my car twice in six months because the Service Engine Light keeps coming on

The thermostats on this engine have an electrical heater element intended to help the engine warm up faster. Many thermostat housings for this engine are plastic - from different suppliers. The plastic housings tend to leak around the heater wire...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com