How to Replace the Spark Plugs on a 2010-2015 Mercedes GLK

#Misfire/spark plug replacement / Mercedes

What to expect when you are replacing your self Spark plugs in your vehicle. In our case one of the sockets was manufacture defect, and it was partially glued and in results, was slightly damaged, but then repaired with JB Weld.

🔵Spark Plug - Mercedes-Benz GKL350 4Matic

2010 Mercedes-Benz (004-159-18-03-26) https://tinyurl.com/ycez45nq

2011 Mercedes-Benz (004-159-18-03-26) https://tinyurl.com/ycq3htvg

2012 Mercedes-Benz (004-159-18-03-26) https://tinyurl.com/y73trlql

2013 Mercedes-Benz (004-159-81-03) https://tinyurl.com/y9l6wthk

2014 Mercedes-Benz (004-159-81-03) https://tinyurl.com/yccuasgq

2015 Mercedes-Benz (004-159-81-03) https://tinyurl.com/y8umce5b

🔵If you are opening the hood, here is following parts that can be replaced as well in 2010 Nodel

Ignition Coil - Mercedes-Benz (272-906-00-60) https://tinyurl.com/y763nuej

Air Filter - Mercedes-Benz (273-094-04-04) https://tinyurl.com/ycm8nz4f

🔵For any other parts can be found here https://www.mbpartscenter.com/

🔵Car is shaking or vibrating

🔵A bad, old or dirty spark plug can cause the engine to misfire. If the problem is ignored or you continue to drive, this can spread to the spark plug wires, catalytic converter, or ignition coils which can lead to a very costly repair.

🔵Common Engine Misfire Symptoms

Depending on the type of misfire and what caused it, you will notice one or more of the following misfire symptoms:

Engine Vibrations

Loss of power

Shaking / Vibrations Noticeable at Low RPMS and idle

Vibrations go away at high RPMS typically over 3000

Engine Stalls in some cases

Poor Engine Performance

Check Engine Light

Fuel / Gasoline smell from exhaust

Blinking Check Engine Light

🔵You most likely will get one of the following codes

P0300 Random/Multiple Cylinder Misfire Detected

P0301 Cylinder 1 Misfire Detected

P0302 Cylinder 2 Misfire Detected

P0303 Cylinder 3 Misfire Detected

P0304 Cylinder 4 Misfire Detected

P0305 Cylinder 5 Misfire Detected

P0306 Cylinder 6 Misfire Detected

P0307 Cylinder 7 Misfire Detected

P0308 Cylinder 8 Misfire Detected

P0309 Cylinder 9 Misfire Detected

P0311 Cylinder 11 Misfire Detected

P0312 Cylinder 12 Misfire Detected

If you are reading fault codes such as P0301 through P0312, that means that most likely the problem is with one of the cylinders misfiring. This is due to a bad spark plug, spark plug wire or ignition coil issue.

If you are reading a P0301 through P0312 code plus another code, let say P0100. It is very likely that the P0100 fault code which refers to a malfunction in the mass air flow sensor circuit is also causing the misfire codes and even a limp home mode. Lime home mode means the transmission gets stuck in gear, typically in second gear.

The bottom line is that you need to research all the codes that your OBD-II scanner retrieves from the ECU. Now let’s talk about some of the most common reasons that cause engine misfire and check engine light on in a Mercedes-Benz car.

🔵Common Causes of Mercedes Engine Misfire

Spark Plugs

mercedes spark plug engine misfireThe #1 cause of Mercedes engine misfire is old spark plugs. Spark plugs don’t last forever. They are wear and tear items. Standard copper spark plugs last up to 30k miles while iridium and platinum spark plugs can last over 60,000 miles. If your Mercedes-Benz has over 80,000 miles and still has the original spark plugs, it makes sense to change the spark plugs before you pour money on any other repair. New spark plugs will make your engine run smoother, and you will even see an improvement in gas mileage. Rember that Mercedes-Benz V6 and V8 engines utilize two spark plugs per cylinder. That is typical in Mercedes-Benz engines such as M112 M113 M272 M273 found on E, C, S, CL, CLK, ML, GL, G, R, SLK Class. For example, if you have an E320 (M112 engine) or E350 (M272) your car has six cylinders but requires 12 spark plugs.

🔵Replacement spark plugs for your Mercedes-Benz can be purchased on Amazon if you are looking for a way to save money on parts.

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