Timing chain kit M270 for Mercedes-Benz

OE spec engine thermostat assembly, engineered for Mercedes Benz vehicles with the M270 1.6L or 2.0L turbo petrol engine. Restores correct warm up time and stable operating temperature, protects against overheating and weak heater performance. Sold per unit, variant specific as supplied with housing and sensor where applicable.

What this is / isn’t
Included: 1× thermostat assembly, housing and seal, plus temperature sensor or actuator where supplied.

Important: Match by VIN and engine code M270. Transverse A, B, CLA and GLA models can use different housings, outlet angles and connectors by year and market. Some trims share components with related M274 or M282 families, always confirm by OE part number.

Key Features:

• Precise temperature control: OE matched opening temp and flow for steady engine and cabin heat.

• Integrated housing and seal: Direct bolt on replacement to reduce leaks and comebacks.

• Correct sensor or actuator logic: Works with the ECU for accurate warm up and efficiency.

• Durable materials: High temp plastics and elastomers resist glycol and heat cycling.

• Exact fitment: Factory mounting points for a no mod install.

Compatibility:
Vehicles equipped with the M270 turbo petrol, match by VIN or OE:

• A Class W176 A180, A200, A250

• B Class W246, W242 B180, B200, B250

• CLA Class C117, X117 CLA180, CLA200, CLA250

• GLA Class X156 GLA200, GLA250
  Note: Longitudinal C Class typically uses M274, verify via VIN.

Options, engine or sensor variations:

• Standard M270 thermostat with integrated housing.

• Model year revisions may change connector index or outlet angle.

• Market or emissions variants can alter hose size and heater outlet routing.

Typical OE reference families, guide only:
A270-200-… , A270-203-… with supersessions by year and market.
Always order by the exact OE part number on your vehicle or confirm via VIN.

Symptoms of a faulty thermostat:

• Slow warm up, temperature gauge low or fluctuating.

• Overheating in traffic or under load.

• Weak cabin heat, fault code P0128 or related temperature errors.

• Coolant seepage at the housing, dried crust around joints.

Installation notes, pro tips:

• Work on a cold engine. Drain coolant to below housing level.

• Replace the seal or O ring, clean mating faces, torque bolts evenly to spec.

• Refill with Mercedes approved coolant, MB 325.x spec, bleed thoroughly.

• Verify fan operation and hose temps on first heat cycle, clear stored codes after a road test.

• Inspect adjacent hoses, clamps and plastic tees for age related brittleness.

What’s included / not included:
✅ 1× Thermostat assembly with housing and seal, sensor or actuator if supplied
❌ Coolant, hoses, clamps, water pump, radiator, extra sensors, hardware

Q&A
Q1: How do I confirm I have the M270 engine?
Check your VIN data card, M270 is used in transverse A, B, CLA and GLA models. Your VIN maps to the exact part number.
Q2: Do I need coding after replacement?
No coding is usually required. Clear fault codes and verify operating temperature with a scan tool.
Q3: Which coolant should I use?
Mercedes coolant meeting MB 325.x specification, mixed to the correct ratio.
Q4: Should I change anything else at the same time?
Consider a coolant service and inspect hoses, clamps and plastic fittings, replace any brittle parts.

Why choose TOParts:
OE grade engine components for Mercedes Benz with precise fitment, correct specs and long term reliability, trusted by panel shops and independent Mercedes specialists across South Africa.