Locking AdBlue Tank Cap 40mm Set with 2 Keys (fits Mercedes, DAF, MAN, Iveco, Volvo & Scania trucks)
Reviews
Product description
If you want to keep AdBlue access under control, a locking cap is one of those small fixes that can save hassle later. This 40mm locking AdBlue tank cap set is made for commercial trucks and is sold as a replacement option with two keys, aimed at drivers and fleet managers who simply want the tank closure sorted.
On paper it’s straightforward: a lockable safety cover that replaces your original cap, and it comes with keys for day-to-day use and handovers. That said, the biggest thing to get right before buying is compatibility—AdBlue caps can be picky, so you’ll want to check the listed OEM codes against your current part.
Key takeaways
This cap set is designed to be lockable (so access isn’t left open), uses a 40mm size, and is supplied with 2 keys.
It’s positioned as a direct replacement for a range of trucks, including models from Mercedes-Benz, DAF and MAN (the listing also states compatibility with Iveco, Volvo and Scania, but the detailed OEN cross-references provided are for the first group).
It’s not the best choice if you’re unsure about the exact OEM code or you haven’t checked the fit—getting that wrong can mean returning a part that doesn’t sit correctly.
What you’ll notice day to day
In practical terms, the appeal of a locking AdBlue tank cap is control and routine. If you’re running a mixed fleet, doing depot handovers, or dealing with multiple drivers, the ability to lock the tank closure helps keep the system access consistent.
A simple example: say you park overnight and you routinely hand a truck to a different driver each shift. With a locking cap and two keys in the box, you can keep one set on your side and hand the other to the driver without leaving the tank closure “easy pickings”. It’s not glamorous, but it’s the kind of detail that reduces friction.
Where it shines
- Lockable closure with keys: Comes with 2 keys, which helps if you need a backup for operations.
- Replacement-focused: The listing is clearly aimed at replacement/compatible fit, including an OEM code for at least some Mercedes-Benz applications.
- Commercial-vehicle range intent: The text references compatibility across several truck brands commonly seen in UK logistics (Mercedes, DAF, MAN, plus a broader “compatible with” list).
What to watch before buying
The only real “watch out” here is fitment. The description includes an OEM code list and specific model ranges, which is exactly what you should use to confirm compatibility.
Keep in mind that the listing provides detailed OEN cross-references for Mercedes and DAF, and for several MAN applications too. If your truck is one of the brands mentioned but you can’t confirm an OEM match from the supplied information, it may be better to double-check before ordering.
It also helps to verify the 40mm size conceptually matches your current cap—if your existing closure doesn’t line up with the same dimensions/spec, you can end up with an awkward fit.
Tech specs
- Type: Locking AdBlue tank cap (lockable safety cover)
- Size: 40mm
- Keys: Comes with 2 keys
- OEM codes mentioned (Mercedes): A0004702705, 000 470 4405, A0004704405, 001 988 1860, A0019881860, 0 00 470 41 05, A 105, 000 470 24 05, 000 470 26 05, 628 470 08 05, 000 470 18 05, 000 470 27 05
- OEM codes mentioned (DAF): 2171942, 1526 846, 1526846
- OEM codes mentioned (MAN): 81.15402.6027, 81.15402.6008, 81.15501.5135
Who it’s for (and who should skip it)
It suits you if you’re trying to replace a missing, broken, or non-locking AdBlue tank cap and you prefer a set that includes keys. It’s also a sensible pick if you manage vehicles and want consistent access control across a working fleet.
It may not suit you if you don’t have the ability to cross-check the OEM code list, or if you expect a guaranteed fit without doing that check. In that scenario, you could waste time with returns or end up with a part that doesn’t match your existing cap.
Should you buy it?
This locking 40mm AdBlue tank cap set makes sense when access control matters and you want a replacement that’s supplied with two keys. The listing’s OEM cross-references and the model-year ranges for some Mercedes/DAF/MAN applications are the strongest reason to consider it—so long as your current part aligns with those codes.
You should probably avoid buying if you can’t confirm the OEM code (or you only have a vague match). With caps like this, a small mismatch can be the difference between “fits and works as expected” and “not quite right”. If you’re confident in the compatibility check, it’s a practical add-on that can keep AdBlue tank access tidy in everyday fleet use.