Mercedes-Benz GLC Radiator: Specs, Fitment & Common Faults
On the GLC, a water pump and thermostat housing failing together on related models has genuinely been quoted at around £550 — Mercedes-Benz UK offered a 50% goodwill discount specifically on the water pump.
Illustration for editorial purposes
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OEM Part Number: 0995006803 (as quoted in catalogue listings — confirm via VIN) — aftermarket radiators Nissens 606301 / Valeo 701314
| Radiators (aftermarket) | Nissens 606301 (640 x 498 x 26 mm, aluminium soldered core with plastic tanks, 38.5 mm inlet and outlet, supplied with seals; fits the GLC 200 4Matic and 300 4Matic M274 and the 200/300 EQ Boost M264 petrols, plus the W213 E-Class and C257 CLS with the same engines); Valeo 701314; Denso DRM17076; Mahle CR 2604 000P; Van Wezel 30012723; Prasco ME666R001; AKS Dasis 120141N |
|---|---|
| Core sizes & variants | The 2.0 petrol GLC models take the 640 x 498 x 26 mm main radiator. The 220 d and 350 e carry a long, narrow low-temperature radiator in addition to the main one. The main radiator for the OM651 and OM654 diesels and the 3.0 V6 models was not confirmed. |
| Genuine (OE) numbers quoted | 0995006803; A0995006803 (auxiliary radiator); none quoted for the petrol main radiator |
| Fitment notes | The Nissens petrol radiator comes with seals; GLC 220 d and 250 d owners should order the main radiator against the VIN because the diesel core differs from the petrol one. |
Mercedes-Benz GLC Radiator: The Part That Keeps Everything Else From Cooking
It's an unglamorous part, but on the Mercedes-Benz GLC, the cooling system is behind almost every serious non-wear engine failure that could have been prevented. Spotting trouble here early is about as cheap an insurance policy as exists against a genuinely expensive repair bill.
Mercedes-Benz GLC Radiator: What It Does
On the Mercedes-Benz GLC, heat from the engine coolant is shed to the surrounding air through the radiator, keeping engine temperature in a safe range. On automatic gearboxes, it often doubles up, cooling transmission fluid through a separate internal circuit too — which is why getting the exact part number right matters more here than on a simple heat exchanger.
Mercedes-Benz GLC Radiator: Watch: Replacing It
GLC X253 is W205-based.
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A Genuinely Alarming, Honest Real Account Worth Knowing — Mercedes-Benz GLC Radiator
If a water pump and thermostat housing have both been found leaking at the same time, this is genuinely worth knowing: a water pump and thermostat housing failing together has been documented on genuinely young, low-mileage related models, with a combined repair cost of around £550 in one documented case. Mercedes-Benz UK offered a genuine 50% goodwill discount specifically on the water pump element, on the basis it had failed earlier than would reasonably be expected, worth directly asking for this kind of discount if facing a similar early failure.
It's also genuinely worth knowing that a slow water pump seal leak can drip coolant directly onto the spinning pulley behind it, which flings the coolant off, making a genuine leak surprisingly difficult to trace for some time.
Mercedes-Benz GLC Radiator: Faults, DIY Difficulty & Aftermarket Advice
These are the same regardless of make or model — see our full Radiator Guide for the three common failure modes, confirming fitment against your VIN, and OEM vs aftermarket guidance.
More Mercedes-Benz Radiator
The same part, covered across other Mercedes-Benz models.