This guide will help you to replace Mercedes ignition coil. Replacing Mercedes-Benz ignition coils is very easy if you have the right tools. These instructions apply to several Mercedes-Benz cars with V6, V8, and V12 gasoline engines.
Failed ignition coils will cause engine misfire. The car will run rough and the engine may shake extensively. Check engine light will in most cases turn on.
Replacing Mercedes Ignition Coil Packs is easy. If you plan on replacing only one coil, you will need less than 30 minutes. If you replace all ignition coils (6 on V6, 8 on V8, 12 on V12), you will need a couple of hours.
How to replace the spark plug ignition coil on a Mercedes-Benz
- Mercedes Ignition Coil (s) CLK ML SL S CL C G CLS SLK R-Class.
- Open the hood by pulling the hood release under the dashboard.
- Disconnect the negative terminal from the battery. Do not touch ignition coils or spark plug wires when the engine is running. Ignition coils generate a very high voltage that can be hazardous and even cause death.
- Remove the engine cover. It can easily be removed by grabbing the cover on both sides and lifting it. The engine cover is secured with four tabs; most models don’t use bolts to hold it in place.
- Locate the defective ignition coil. You have three coils on the driver’s side and three coils on the passenger side on the six-cylinder engines. In our case, we have an eight-cylinder engine, so you will see four coils on each side.
- Remove the spark plug wires. For this step, you will need the spark plug wire removal tool that we listed above under the tools required. Otherwise, you risk damaging the spark plug wire, and the spark plug itself.
- Remove the Torx bolt at the center of the ignition coil pack. Unplug the electrical connector from the coil pack. Note: The clip that tightly holds the connector on the ignition coil can break easily. Suppose yours does break, use self-locking cable ties to secure the electrical connector to the ignition coil.
- Note the position of the spark plug wires. If you look carefully at the ignition coil pack, you will see two letters. They are there to help you avoid installing the wires incorrectly. They will have letters A and B, and you will see the same letters on the engine block.
- Remove spark plug wires from the old ignition coil and install them on the new ignition coil. Firmly press the spark plug boot into the spark plugs. Connect the electrical connector. Tighten the bolt in the center of the ignition coil to 8 Nm.
- Congratulations! You have successfully replaced one or more coil packs on your Mercedes-Benz.
Frequently Asked Questions
How much does it cost to replace Mercedes’s ignition coils?
Replacing a single (one) spark plug coil on a Mercedes-Benz can cost between $170 and $250 at an auto repair shop. If you replace it yourself, you can spend less than $50. Above, we have provided links to sites where you can purchase Mercedes-Benz ignition coil packs.
How do you erase/reset the check engine light after replacing a defective ignition coil?
As long as there are no other fault codes, the check engine light should turn off on its own, typically after three driving cycles. You should use an OBD II scanner to clear the ECU fault codes. Otherwise, they will change from CURRENT status to STORED. If you need help clearing the ECU codes, read this article on How to check the engine light on a Mercedes-Benz.
What is the Best OBD-II Scanner for a Mercedes-Benz vehicle?
The YOUCANIC full system diagnostic scanner is a valuable tool for Mercedes-Benz owners who want to troubleshoot problems with their vehicles. This advanced scanner can read and interpret fault codes from the car’s computer system, providing detailed information about any problems with the engine, transmission, brakes, or other critical systems. The scanner can also perform diagnostic tests on various systems, including the ABS, airbag, and steering systems, to help pinpoint the root cause of any issues. With this information, you can make more informed decisions about repairs and maintenance, saving time and money on costly repairs.
In addition to its diagnostic capabilities, the YOUCANIC scanner can help you reset maintenance reminders and service indicators, allowing you to stay on top of your vehicle’s regular maintenance schedule. This is important because regular maintenance is essential for keeping your Mercedes-Benz running smoothly and preventing major problems down the line. Using the YOUCANIC scanner, you can ensure that your vehicle is always in top condition, reducing the risk of breakdowns and other issues that could cause inconvenience or costly repairs. Whether you’re a DIY mechanic or a professional technician, the YOUCANIC full system diagnostic scanner is essential for troubleshooting Mercedes-Benz problems and keeping your vehicle in top condition.
How to replace the ignition coil pack on the Mercedes V12 600?
The instructions are similar to the steps that we provided above. Here is a great video that shows how to replace Mercedes ignition coils on a V12.
What check engine codes (DTC fault codes) can point to a bad ignition coil?
|P0350 Ignition Coil Primary/Secondary Circuit Malfunction|
|P0351 Ignition Coil A Primary/Secondary Circuit Malfunction|
|P0352 Ignition Coil B Primary/Secondary Circuit Malfunction|
|P0353 Ignition Coil C Primary/Secondary Circuit Malfunction|
|P0354 Ignition Coil D Primary/Secondary Circuit Malfunction|
|P0355 Ignition Coil E Primary/Secondary Circuit Malfunction|
|P0356 Ignition Coil F Primary/Secondary Circuit Malfunction|
|P0357 Ignition Coil G Primary/Secondary Circuit Malfunction|
|P0358 Ignition Coil H Primary/Secondary Circuit Malfunction|
|P0359 Ignition Coil I Primary/Secondary Circuit Malfunction|
|P0360 Ignition Coil J Primary/Secondary Circuit Malfunction|
|P0361 Ignition Coil K Primary/Secondary Circuit Malfunction|
|P0362 Ignition Coil L Primary/Secondary Circuit Malfunction|
|P2025 P0351  : T1/1 (ignition coil cylinder 1) Combustion period , Readout too small [P0351]|
|P2025 P0351  : T1/1 (ignition coil cylinder 1) Primary voltage [P0351]|
|P2025 P0352  : T1/2 (ignition coil cylinder 2) Primary voltage [P0352]|
|P2025 P0352  : T1/2 (ignition coil cylinder 2) Combustion period , Readout too small [P0352]|
|P2025 P0353  : T1/3 (ignition coil cylinder 3) Combustion period , Readout too small [P0353]|
|P2025 P0353  : T1/3 (ignition coil cylinder 3) Primary voltage [P0353]|
|P2025 P0354  : T1/4 (ignition coil cylinder 4) Combustion period , Readout too small [P0354]|
E-Class W210 W211 (E320, E500, E350, E55)
C-Class W202 W203 W204 (C240, C320, C350, C280, C300)
CLK-Class W208 W209 ( CLK320, CLK430, CLK500)
CLS-Class W219 (CLS 500 CLS550 CLS55 AMG)
ML-Class W163 W164 (ML320, ML430, ML350, ML500, ML55 AMG)
S / CL-Class W220 (S420 S430 S500 S55 S600 CL500 CL600)
SLK R170 R171 (SLK320, SLK32, SLK350, SLK280)
W463, 129, 463, R170, 230, R171 G500 SL500 SL600
Related Part Numbers:
|000 158 72 03||0001587203||0001501980||0001502680|
|A0001587303||A000158780||0001587803||000 158 78 03|