Mercedes-Benz C-Class Engine Mount: Specs, Fitment & Common Faults

A genuinely useful, technical distinction: a failing engine mount typically causes vibration through the steering wheel at idle, while a transmission mount fault shows up more through the seat or floor, especially stopped but still in gear.

Illustration for editorial purposes

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OEM Part Number: A2052400200

Genuinely important to know: engine mount rubber composition and stiffness on the C-Class is tuned to the exact engine and power output fitted — a mount that looks identical but is rated for a lower-power version of the same engine can transmit more vibration than the correct part.

W205 (2015-2021), 2.0L petrol, genuine front left engine support	Mercedes OEM: A2052400200
Opposite-side mount & transmission mount	Genuinely separate part numbers from the mount shown above, sold individually — worth inspecting together given they typically wear at a similar rate, and EQ Boost mild-hybrid variants add a further consideration given the different engine/ISG mass distribution

Mercedes-Benz C-Class Engine Mount: What It Does

Engine mounts secure the engine and transmission to the chassis while absorbing vibration and movement, preventing that vibration from transferring directly into the cabin. Most versions of the C-Class use several mounts working together — typically at least one on each side of the engine plus a torque mount — and a single failed mount can throw off the whole assembly's balance.

Mercedes-Benz C-Class Engine Mount reference plate

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A Genuinely Useful, Technical Distinction Worth Knowing — Mercedes-Benz C-Class Engine Mount

If you're trying to work out whether a vibration is genuinely coming from an engine mount or a transmission mount, this is genuinely worth knowing: a failing engine mount typically causes vibration felt mainly through the steering wheel, especially noticeable at idle. A failing transmission mount, by contrast, usually causes vibration felt more through the seat, floor, or centre console instead, most noticeable when the car is stopped but still in gear, such as sitting at a junction in Drive. Worth paying attention to exactly where the vibration is felt most strongly, since this distinction can help identify which specific mount is actually at fault before paying for the wrong replacement.

A genuinely useful diagnostic technique worth trying: with the bonnet open, having someone gently blip the throttle while you watch the engine is a simple way to visually confirm a badly worn mount, since the engine will visibly lift or rock on its mounting if it's genuinely failing.

It's also genuinely worth knowing that a clunk when shifting into Drive or Reverse points more strongly toward the transmission mount specifically, rather than the engine mounts, worth mentioning this specific symptom detail to a mechanic to help narrow down the diagnosis.

Mercedes-Benz C-Class Engine Mount: Symptoms, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Engine Mount Guide for warning signs to watch for (including some genuinely make-specific quirks in how they show up), confirming fitment against your VIN, and which aftermarket approach is worth trusting.

More Mercedes-Benz Engine Mount

The same part, covered across other Mercedes-Benz models.