Ignition Coil and Iridium Spark Plugs for Mercedes-Benz GLA250 (2015-2020) 2.0L

Direct-Replacement Ignition Coil and Iridium Spark Plug Kit for 2015-2020 Mercedes-Benz GLA250

What it Does: The ignition coil and iridium spark plug kit replaces worn factory ignition components on the 2015-2020 Mercedes-Benz GLA250 to eliminate high-load misfires, restore flame kernel propagation, and stabilize idle across all cylinders.

The Stock Mercedes-Benz GLA250 Ignition System Vulnerabilities

The turbocharged 2.0L inline-4 engine in the X156 chassis subjects ignition components to intense thermal cycling and elevated cylinder pressures. Over time, factory pencil coils suffer dielectric breakdown as the internal epoxy degrades, resulting in secondary winding voltage leakage and micro-arcing. Simultaneously, stock spark plug electrodes widen from high-boost spark erosion, increasing the required firing voltage. This compounded electrical resistance strains the coil packs, triggering partial quench conditions, low-RPM hesitation, erratic idle, and diagnostic trouble codes such as P0300 through P0304.

The Engineering Solution

This direct-fit overhaul kit provides four high-output pencil ignition coils paired with fine-wire iridium spark plugs to restore baseline combustion efficiency. The ignition coils feature high-temperature silicone spark plug boots and premium dielectric epoxy to isolate high secondary voltage and prevent flashover. Internally, reinforced copper windings provide rapid saturation and high spark energy across the entire rev range. The included spark plugs feature laser-welded fine-wire iridium center electrodes and high-alumina ceramic insulators, ensuring maximum resistance to fouling and spark blowout under peak boost. This kit directly interchanges with OEM part numbers 2749060700, 2749061400, UF734, and UF820 under MPN KIN134649TOP.

Technical Specifications

Compatibility

• 2015-2020 Mercedes-Benz GLA250 Base Front-Wheel Drive 2.0L L4 (M270)
• 2015-2020 Mercedes-Benz GLA250 4Matic All-Wheel Drive 2.0L L4 (M270)

Frequently Asked Questions

Does this fit the X156 GLA250?
Yes, this is a direct fit for the 2015-2020 Mercedes-Benz GLA250 equipped with the M270 engine.

Do these iridium spark plugs require manual gapping prior to installation?
No, these plugs arrive factory pre-gapped for direct application, and manual gapping risks fracturing the fine-wire iridium electrode.

The Mercedes-Benz Precision Standard

European direct-injected powertrains demand tight electrical tolerances to maintain accurate closed-loop ECU feedback. Matching OE primary and secondary resistance values ensures flawless communication with the engine control unit, preventing false misfire detections and catalytic converter damage while delivering zero-CEL reliability.