Mercedes Benz SL450 Spark Plug Type
Factory spark plug specifications for the Mercedes Benz SL450.
Last updated: 2026-11-01 • Reading time: 8 min • By AllOEMManuals Editorial Team
Quick Answer
2017-2020 Mercedes Benz SL450: 0, 8 mm.
| Generation | Years | Top spec |
|---|---|---|
| 2017-2020 | 2017-2020 | 0, 8 mm |
This vehicle's factory manual
Mercedes Benz SL450: choose your year, then confirm the engine, trim, or drivetrain to open the available repair and diagnosis sections.
Mercedes Benz SL450 maintenance schedule
Know the exact spark plug type job for your Mercedes Benz SL450
2017-2020 Mercedes Benz SL450: 0, 8 mm.
Spark plug type and gap depend on the exact engine. Confirm the engine code before buying plugs or setting the gap. Once the spec is confirmed, use the supplies and purchase links below to build the full one-trip shopping list before you start the repair.
Exact Vehicle Check
The button opens the factory book for this vehicle. Use the engine picker only when your trim is not the one this page already matched.
2017-2020
Parts and supplies
These links search for related products. Check your year, engine, specification, and fitment with the seller before ordering.
Mercedes Benz SL450 Spark Plugs Plugs
Confirm the specification and fitment for your exact vehicle before ordering.
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Spark Plugs — Manual's Parts List
Exact plugs, exact torque, no stripped threads.
- 1Spark PlugsShop →
0, 8 mm — buy the full set, not one at a time
- 2Torque Wrench (3/8")Shop →
Use the torque specified for your engine and spark plugs
- 3Spark Plug SocketShop →
Magnetic or rubber insert — protects the ceramic
- 4Dielectric GreaseShop →
On the boot — prevents misfires from moisture
Get everything at once
Search results vary; confirm each item and its fitment before buying.
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One-Trip Shopping List
Recommended supplies and tools for this job, grouped so you can buy everything before the repair starts.
Iridium Spark Plugs
Long-lasting performance plugs for modern engines.
Spark Plug Socket
Magnetic or rubber-insert socket to prevent damage.
Gap Gauge
Ensure your plugs are set to the exact factory spec.
Torque Wrench
Crucial for tightening plugs without stripping threads.
Anti-Seize Lubricant
Prevents plugs from welding to the cylinder head.
Dielectric Grease
Protects ignition boots and connectors from moisture.
Project Essentials
Basic tool sets, gloves, and cleaning supplies for your Mercedes Benz SL450 so the job is ready when the parts arrive.
Frequently Asked Questions
- What spark plug type does a Mercedes Benz SL450 use?
- 2017-2020 Mercedes Benz SL450: 0, 8 mm.
- What is the spark plug gap for a Mercedes Benz SL450?
- 0, 8 mm (2017-2020)
- How often to replace spark plugs on a Mercedes Benz SL450?
- Factory service manuals typically recommend spark plug replacement every 30,000–100,000 miles depending on plug material (copper, platinum, or iridium). Check your maintenance schedule for the exact interval.
Find your service manual
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Author & Review
Published by AllOEMManuals, founded by Lyndon Bedford, an automotive technician with 20 years of experience. He owned and operated a mechanic shop in Hurst, Texas from 2014 to 2022 and continues hands-on repair work.
Content may combine manual references, general repair templates, and AI-assisted drafting. Confirm the source, vehicle configuration, and applicability before working. Report corrections through our contact page.
Last updated: 2026-11-01