Champion 9408 spark plug for the 2008-2012 Mercedes-Benz C300 V6 3.0L and other vehicles ignites the air-fuel mixture in the cylinder. The Champion Iridium design is meant to work with any ignition type.
- Champion Iridium line with a fine-wire iridium center electrode for faster, more efficient ignition
- Platinum-enhanced ground electrode for precise spark targeting
- Pre-gapped design that simplifies installation
- Alloy that reaches and holds the correct operating temperature to reduce fouling
- Coated shell that resists corrosion in harsh environments
- Engineered for reliable ignition in all weather conditions
Quick facts
- Part: Champion 9408 spark plug
- Fits: the 2008-2012 Mercedes-Benz C300 V6 3.0L and other vehicles
- Material: iridium center electrode tip
- Condition: New
A worn plug can show up as hard starting, a rough idle or a misfire. Before you replace the plugs, rule out a bad ignition coil, damaged wiring or a fuel problem, since any of them can produce a misfire on their own.
Fits
This Champion Iridium spark plug is built to meet OE fit, form and function on the 2006-2011 Mercedes-Benz E350 V6 3.5L, the 2017 Genesis G80 V6 3.8L or V8 5.0L and a wide range of other Mercedes-Benz, Hyundai, Genesis, Dodge and Freightliner models. Each cylinder takes one plug, so the V6 engines use six and the V8 engines use eight. Look up your own year, model and engine in the "Vehicles it fits" section on this page.
Specifications
Fit and size
- Quantity per vehicle: 6 on V6 engines, 8 on V8 engines
- Thread diameter: 12 mm (0.47 in)
- Pre-gap: 1.05 mm (0.041 in)
- Seat type: flat
Build and materials
- Plug type: RER8WYPB4
- Center electrode tip: iridium
- Ground electrode: J gap
- Resistor type: yes
- Washer: crush washer, included
- Condition: new
- Country of origin: China
In the box
One spark plug and its crush washer.
Interchange: AI5702 · XP5702 · RER8WYPB4 · 68005667AA · 68005667AB · 1885111070 · 91356 · 93135 · 93911 · 94731 · DILKR7A11 · DILKR7C11 · ILKR7B8 · LKR6AHX
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
AI5702, XP5702, RER8WYPB4, 68005667AA, 68005667AB, 1885111070, 1989, 91356, 93135, 93911, 94731, DILKR7A11, DILKR7C11, ILKR7B8, LKR6AHX
Frequently Asked Questions
Do these spark plugs fit a 2008-2012 Mercedes-Benz C300 V6 3.0L?
Yes. Champion 9408 is listed for the 2008-2012 Mercedes-Benz C300 V6 3.0L, which takes six plugs, one per cylinder.
Are these Champion Iridium spark plugs pre-gapped?
Yes. This plug comes pre-gapped at 1.05 mm (0.041 in), so it is ready to install.
Does the RER8WYPB4 plug come with a washer?
Yes. A crush washer is included, and this plug has a flat seat.
What signs can a worn iridium spark plug cause?
A worn plug can lead to hard starting, a rough idle or a misfire.
Is Champion 9408 a resistor spark plug?
Yes. Champion 9408 is a resistor plug with an iridium center electrode tip and a J-gap ground electrode.
