Mercedes GLS Recalls — Recall Check & TSB Guide

The Short Answer

A Mercedes GLS recall check must always be run against the VIN, never the badge — the X166 (sold as the GL until its 2015 facelift, then the GLS) and the X167 carry different campaign histories, and some older records list the same chassis under both names.

Check your VIN against the manufacturer's recall register via any Mercedes franchised dealer, or the GOV.UK vehicle recall lookup [THIRD-PARTY]
Recall work is completed free of charge, whatever the car's age, mileage or number of previous keepers
Recalls, TSBs and known faults are three different things — most widely discussed GLS issues are in the latter two categories
The X166 platform generated 120 replacement-engine enquiries in our 2025 dataset [EM-VERIFIED] and clears our replacement-to-value threshold comfortably

Confirm your exact car by VIN first, then review the known-fault section below before you buy or commit to work.

Recalls affecting the Mercedes GLS

Two generations matter here. The original big seven-seat SUV arrived on the X166 platform badged as the GL, and took the GLS name at its 2015 facelift — so campaigns touching early cars may be registered against "GL" and later ones against "GLS" on the same chassis. The current X167 replaced it from 2019. Our X166 guide and X167 guide cover the full model history and engine line-ups.

Mercedes GLS recall campaigns — sourced entries only
Recall ref	Announced	Affected builds	Issue	Remedy
[PLACEHOLDER — confirm vs official record]	[PLACEHOLDER]	[PLACEHOLDER]	[PLACEHOLDER]	[PLACEHOLDER]
[PLACEHOLDER — confirm vs official record]	[PLACEHOLDER]	[PLACEHOLDER]	[PLACEHOLDER]	[PLACEHOLDER]

Editorial rule: recall entries on this site publish only when sourced and dated against official records. The placeholders above are not missing research — they are the page refusing to guess. Until each row is verified, treat your VIN check with the dealer or the GOV.UK lookup [THIRD-PARTY] as the authoritative answer, and check the data verification record for what has since been confirmed.

Engines fitted across the two generations shape where to focus: the X166's diesels used the OM642 V6 and its petrols the M276 V6, while the X167 moved to the OM656 straight-six diesel and the newer modular petrol family. Engine-specific campaigns, when confirmed, are listed against the affected build ranges above.

How to run a Mercedes GLS recall check

A Mercedes GLS recall by VIN is the only check that counts, because campaigns attach to specific build ranges within a model — two identical-looking GLS 450s can have different recall status. Here is the sequence we recommend:

Find the VIN. It's on the plate at the base of the windscreen, the door shut panel, and in the V5C logbook. On a pre-2015 car remember it may be badged GL rather than GLS — the VIN doesn't change, so this doesn't affect the lookup.
Check the official channels. Any Mercedes franchised dealer will run your VIN against the manufacturer's recall register free of charge, and the GOV.UK vehicle recall lookup covers UK-registered vehicles [THIRD-PARTY]. Our VIN decoder also helps you confirm model, generation and engine from the same number.
Cross-reference this page. The sourced table above shows what each confirmed campaign involves and what the remedy looks like, so you know what to expect before booking.
Bought used? Check anyway. Recall entitlement follows the vehicle, not the keeper, and there is no time limit on completing an open recall — previous owners may never have had the work done.
Get it done at no cost. Genuine recall repairs are completed free at a franchised dealer, regardless of age or mileage. If anyone quotes you for a job described as a recall, question it.

TSBs, recalls and known faults — three different things

Owners regularly tell us a garage "did the recall" when something else entirely happened, so the distinction is worth being precise about:

A safety recall is a formal campaign notified to the authorities. The manufacturer contacts registered keepers and fixes the affected cars free of charge.
A technical service bulletin (TSB) is internal workshop guidance about a known issue. It tells dealers how to fix something — it does not oblige anyone to fix it free, and most owners never hear the bulletin exists.
A known fault is a failure pattern documented from real-world experience that never became a campaign at all.

That last category is where most of the GLS conversation actually lives. The issues this platform is known for — the OM642's oil cooler seal, the M276's timing chain, AIRMATIC wear — are TSB and known-fault territory rather than recalled items, which is exactly why the next section exists.

Known faults worth checking alongside recalls

None of the following are confirmed recalls — they are documented failure patterns for the engines fitted to GLS and GL X166 cars, worth inspecting on any example you're buying or owning [PATTERN DATA].

OM642 V6 diesel (X166 350d-era cars). Oil cooler seal leaks from the V of the engine, swirl flap motor failures and turbo seal leaks, typically between 70,000 and 150,000 miles. Indicative independent costs run £800–£1,500 for the oil cooler and £500–£1,200 for swirl flaps, and access makes both labour-intensive [PATTERN DATA]. Full detail on the OM642 knowledge centre.
M276 V6 petrol (X166 petrols). Timing chain stretch, carbon buildup on intake valves and gasket oil leaks, most common on earlier builds between 60,000 and 120,000 miles; chain work runs £1,500–£2,500 [PATTERN DATA]. See the M276 knowledge centre.
OM656 straight-six diesel (X167 350d/400d). A notably more robust design; the area to watch is the AdBlue/SCR emissions system as mileage builds [PATTERN DATA] — covered on our AdBlue and SCR failure page.
AIRMATIC air suspension (both generations). Compressor and valve-block wear is the platform's most common non-engine bill on higher-mileage cars — our AIRMATIC compressor failure guide covers the symptoms and costs.

For context: the X166 platform generated 120 replacement-engine enquiries in our full-year 2025 dataset [EM-VERIFIED] — and remember that enquiry volume reflects how many of these engines are on the road and reaching replacement age, not a failure rate. The full ranking sits on our most-enquired models page.

What recalls don't cover — and the money question

A recall fixes a specific safety defect on a specific build range, free of charge. It does not cover wear items, servicing, or anything outside the campaign's scope — which is why owners of out-of-campaign cars end up asking whether major repair work is still worth doing.

For the X166, our data says usually yes: typical age-relevant values run £10,000–£28,000 [THIRD-PARTY] against reconditioned supply of £3,200–£6,500 [EM-QUOTE], which clears this site's 70% repair-to-value threshold comfortably — the ✅ Safe flag in our repair, replace or scrap framework. The predecessor is a closer call: the older GL X164 generated 72 enquiries in 2025 [EM-VERIFIED] but sits at ⚠️ Watch, since replacement cost can take a large share of a sub-£6k example's value. Check the individual car before committing either way.

Frequently asked questions

How do I check if my Mercedes GLS has been recalled?

Use the VIN, not the badge. Any Mercedes franchised dealer will check it against the manufacturer's recall register free of charge, and the GOV.UK recall lookup covers UK-registered vehicles [THIRD-PARTY]. Then cross-reference the sourced table on this page for context on the remedy.

Can I check Mercedes GLS recalls by VIN for free?

Yes. Both the franchised-dealer lookup and the GOV.UK service are free, and our VIN decoder is free too — it confirms your model, generation and engine from the same number.

I bought my GLS used — do recalls still apply?

Yes. Recall entitlement follows the vehicle, not the keeper, and open recalls don't expire. Check as soon as you take ownership; a previous keeper may never have had the work completed.

Do Mercedes recall repairs cost anything?

No. Genuine recall work is carried out at the manufacturer's expense, whatever the vehicle's age or mileage. If you're quoted for a repair described as a recall, question it before paying.

Is a TSB the same as a Mercedes GLS safety recall?

No. A recall is a formal safety campaign with a notification duty and free repairs. A TSB is internal workshop guidance that informs how repairs are done but creates no obligation to do them free — and most GLS issues owners discuss, from OM642 oil cooler leaks to AIRMATIC wear, sit in TSB or known-fault territory.

What's the difference between a GL and a GLS for recall purposes?

Same X166 chassis, different badge era — the car was sold as the GL until the 2015 facelift renamed it GLS. Official records may list campaigns under either name, which is one more reason the VIN, not the tailgate badge, is what you check against.

Sourced and dated onlyRecall entries never publish on rumour — placeholders stay placeholders until verified.

VIN-level accuracyWe point you at the channels that check your exact car, not its badge.

Real cost contextKnown-fault economics drawn from our 2025 UK enquiry dataset.

100% independentNo sponsors, no manufacturer influence.

15+vetted specialists in our UK network

9,000+real UK enquiries handled to date

17model recall guides in the full index

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Decode your GLS before anything else

Whether a recall applies and what any out-of-campaign repair should cost both start with the same fact: exactly which GLS you have. Enter your registration and confirm the model, generation and engine in seconds.