Key takeaways
- 472 and 473 are one unit: two power cars 472, with trailer car 473 in between.
- Hamburg, not Berlin: three cars per unit – Berlin S-Bahn units have only two.
- No roof pantograph rules out every AC vehicle straight away.
- The difference from the 474 lies in the trailer car number: 473 versus 874.
- Fleet size and deployment change – rely on current sightings, not older lists.
Contents
Fact file
| Vehicle type | Electric DC multiple unit of the Hamburg S-Bahn |
|---|---|
| Electrification system | 1,200 V DC from a side-mounted third rail |
| Train formation | Three-car unit, can be coupled into longer trains |
| Twin class | Power car 472, trailer car 473 |
| UIC type code | 94 – electric multiple unit or railcar |
| Fleet | Significantly reduced – check the current status |
Identifying features
Is this really the class in front of you?
- Three-car unit with no walk-through gangway to the next unit
- No pantograph on the roof; power comes from the side-mounted third rail
- End cars carry 472, the trailer car 473 – both in the same block of four
- Straight, only slightly curved front end with clearly defined windscreens
- Doors arranged in pairs along the car length, for boarding at high S-Bahn platforms
- Twelve-digit UIC number begins with 94
Updated: August 2026 – Three cars, no pantograph, straight front end: anyone spotting in the Hamburg S-Bahn network will sooner or later run into Class 472 / 473. This page explains why a single unit carries two class numbers, how to tell it apart from the newer 474 and the modern 490, and what matters for sighting and photography.
Log an S-Bahn sighting straight away
Number, place, date – with Traintrack the sighting is recorded before the train pulls away again.
What is Class 472 / 473?
Class 472 / 473 is a three-car electric multiple unit of the Hamburg S-Bahn. It runs on 1,200 V DC from a side-mounted third rail – a system that exists nowhere else in Germany besides Hamburg. This network has nothing to do, technically or operationally, with the underground railway of the Hamburger Hochbahn. The two end cars with a driving cab carry Class 472, the unpowered car between them Class 473.
This double designation isn’t a special case – it’s the German standard: for multiple units, cars with and without a driving cab receive separate class numbers, even though they always stay together. For the Class 474 / 874, the 8xx block was used for the trailer car instead – a detail that helps you straight away out in the field.
The 47x Block and What It Saves You
| Feature | 472 / 473 | 474 / 874 | 490 | AC S-Bahn |
|---|---|---|---|---|
| Network | Hamburg | Hamburg | Hamburg | various cities |
| Power supply | third rail | third rail, some dual-system | third rail | overhead line |
| Cars per unit | 3 | 3 | 3 | 3 to 4 |
| Trailer car class | 473 | 874 | – | – |
| Front-end shape | straight, angular | curved, more modern | fully glazed | depends on class |
This overview gives you the quickest check order in the Hamburg network: roof first, then car count, then trailer car number. How the twelve-digit vehicle number is built overall is explained in the article on reading the UIC number on a vehicle.
Identification in Four Steps
Establish the electrification system
No pantograph on the roof means DC power from the third rail. That rules out every regional and AC S-Bahn unit.
Count up to the next driving cab
Three cars per unit points to Hamburg. Two cars per unit is the Berlin pattern.
Read the trailer car number
If it reads 473, the identification is done. An 874 points to the newer Class 474.
Compare the front end
A straight front end with clearly defined windows points to this generation, strongly curved screens to the newer classes.
The general approach, from broad elimination to a definitive feature, is described in the guide to identifying classes.
Which unit is out there right now?
Live sightings from the community show you which vehicles are currently running in the network.
Deployment, Fleet Size and What Keeps Changing
S-Bahn vehicles follow the transport contract and the fleet procurement programme of the network – here, that of S-Bahn Hamburg. For the 472, that means its share of operations has fallen over the years as newer classes have taken over the workings.
What to take from this for practical purposes:
- Don’t assume fixed line assignments. Which class runs on which branch is scheduled and can change at short notice.
- Fleet size is a snapshot. Figures from older sources may be out of date.
- The number beats the livery. Colour schemes get updated; the vehicle number stays.
Anyone looking for specific spots will find pointers in the overview of the best stations for trainspotting in Germany. For keeping a lasting record of your own sightings, the guide to keeping a sighting log is worth a look.
Third rail: no place for experiments
In the Hamburg network, a live third rail runs alongside the track. The track area is always off-limits, without exception here. Stay behind the platform edge and the safety line, and don't step onto operational railway land or stabling sidings.
Understanding Train Formation: Unit, Train Length, Diagram
The most common beginner’s mistake in the Hamburg network is counting the whole train instead of the unit. A nine-car train is not a nine-car class, but three coupled three-car units. Anyone who confuses this ends up searching for a class that doesn’t exist.
Three terms you should keep clearly separate:
- Unit. The smallest operational formation, here three cars with driving cabs at both ends. It’s the defining feature of the class.
- Train length. A result of scheduling: one, two or three units depending on demand and time of day. It changes several times a day and says nothing about the class.
- Diagram. The plan by which a vehicle is deployed over the day. It changes with the timetable year, engineering works and vehicle availability.
For identification, only the unit counts. For documentation, train length is still a useful extra detail: it later shows how heavily a route was loaded at a given time, and makes your sightings comparable across years.
A second point that matters in the Hamburg network: mixed formations are possible. It isn’t guaranteed that all units of a train belong to the same class. It’s therefore worth reading more than one car number on a long train – otherwise you might document one class and miss the second one running right behind it. Such mixes are the more interesting sightings, especially during transition periods when one class is being replaced.
For comparison with a completely different train formation system, it’s worth looking at Class 480 from Berlin: there, units have two cars each and up to four units make up a full train.
Common Mix-Ups
It points to the 472 / 473 if …
- the end cars carry 472 and the trailer car 473
- the unit has three cars and no roof pantograph
- the front end looks straight and only slightly curved
- the vehicle is running in the Hamburg network
Look more closely if …
- you only see the side view – 472 and 474 look similar in profile
- several units run coupled together and you count six or nine cars
- a special livery masks the differences in shape
- you only see the number indistinctly and confuse 473 with 474
It is not a 472 if …
- a pantograph sits on the roof – then it's an overhead-line vehicle
- a unit consists of only two cars: Berlin practice, like the 481 or 483
- the trailer car carries the number 874 – that's the 474
- the front is glazed across the full width, as on the 490
Worth a look for comparison is Class 481 / 482 from Berlin: same basic idea, but two cars per unit and a completely different vehicle profile.
For your own collection, it’s also worth recording the condition: markings, colour scheme and visible rebuilds change several times over a vehicle’s life. An entry with number, date and a short condition note later describes a specific point in time, not just a vehicle – especially for a class whose fleet is shrinking, that’s the difference between a list and a proper record.
Verdict
Class 472 / 473 can be reliably identified once you separate two things: the network and the generation. You spot the network from the missing pantograph and the three-car unit, the generation from the trailer car number. Everything else – livery, line, train length – is variable and no use for identification.
In short
Three cars, no overhead line, trailer car with 473: that's the Hamburg 472. If the trailer car carries an 874, you're looking at the newer 474 – one glance that ends every mix-up.
Collect all the Hamburg classes
Keep track of which units you've already encountered – and which you're still missing.
Summary
- Class 472 / 473 is a generation of the Hamburg DC S-Bahn between the legacy classes 470/471 and the more modern vehicles 474 and 490.
- Its hallmarks are the three-car unit, the straight front profile and the twin class designation within the 4xx number block.
- Anyone spotting in the Hamburg network should learn the four classes 471, 472, 474 and 490 side by side – then every identification becomes quick.
- As the fleet shrinks, every cleanly documented sighting with number and date gains value.
Frequently asked questions
What is Class 472 / 473?
It's a three-car electric multiple unit of the Hamburg S-Bahn that runs on DC power from a side-mounted third rail. The two end cars carry the class number 472, the car between them the 473. Together they form an operationally inseparable unit.
Why does the trailer car have its own class number?
The German scheme lists vehicles with and without a driving cab separately. For this class, the trailer car number stayed within the same hundred-block as 473. For the newer 474, the 8xx block was used instead – 874 – a practical difference you can read straight off the side of the car.
How do I tell the 472 apart from the 474?
Fastest way is via the trailer car number: 473 belongs to the 472, 874 to the 474. Visually, the 474 looks more modern with a more curved front and larger window areas, while the 472 is straighter and more angular.
Does Class 472 still run in scheduled service?
The fleet has shrunk considerably as newer vehicles have taken over the workings. How many units are still running at any given time keeps changing. So check the current status via real-time data and community sightings rather than relying on older figures.
Can Class 472 operate outside Hamburg?
Practically not. It is designed for the Hamburg DC system with a side-mounted third rail and has no pantograph for overhead line. Transfers are only possible as a towed move, so its operating area stays confined to the Hamburg network.
How many cars does a complete train have?
A unit has three cars. Depending on demand, several units are coupled together in service, giving trains of six or nine cars. There is no walk-through gangway between units – so when identifying, always count only up to the next driving cab.
What does the UIC type code 94 mean?
It appears in the first two digits of the twelve-digit vehicle number and denotes electric multiple units and railcars. That's the standard case for S-Bahn vehicles. The code says nothing about the electrification system – you can only tell overhead line from third rail by looking at the roof.
Where is it worth photographing this class?
At stations with long, straight platforms and a clear view of the approaching unit. Look for good side lighting, keep your safety distance from the platform edge, and allow enough width in the frame so the whole three-car unit fits in the shot.
Log your sighting of the S-Bahn Hamburg Class 472 / 473
Date, location and vehicle number logged in seconds – and visible to the community.
Related classes
S-Bahn Hamburg Class 474 / 874
Class 474 with trailer car 874 is a mainstay of the Hamburg S-Bahn – and the only class there where some units carry a pantograph.
EMUS-Bahn Hamburg Class 471
Class 471 shaped the look of the Hamburg S-Bahn for decades. Here's how to identify this DC multiple unit and tell it apart from the neighbouring Classes 470 and 472.
EMUS-Bahn Hamburg Class 490
Class 490 is the newest vehicle generation of the Hamburg S-Bahn. Here's how to recognise it by front end, car count and number – and tell it apart from the 474.
EMUSolaris Tramino (Leipzig)
The Solaris Tramino is a modern low-floor tram running on the Leipzig network. It marks the step up from the first generation of low-floor trams to a fully flat vehicle floor.
EMUStadler FLIRT
The FLIRT is Stadler's most widespread regional multiple unit in Germany. Class 427, 428 or 429 – the number tells you straight away how many cars the train has.
EMUStadler KISS (Class 445 / 446)
The KISS is Stadler's double-deck multiple unit. It shares the German class numbers 445 and 446 with a rival design – it's the construction that separates the two, not the number.
Who is behind it
Groups, brands, manufacturers and operators – who owns whom and how to recognise them out in the field.
Hamburger Hochbahn
Hamburger Hochbahn is the Hanseatic city's municipal transport operator: the U-Bahn and a large part of the bus network. The S-Bahn belongs to a different group, and the hvv logo on the door tells you nothing about the operator – it only stands for the fare system.
BrandS-Bahn Hamburg
Hamburg's S-Bahn runs on a third rail in the city, yet still leaves its own system: one branch continues under overhead line. This hybrid role makes it technically unique – and makes the brand name worthless for identifying the operator.
Where to see the S-Bahn Hamburg Class 472 / 473
Specific viewpoints with lighting times, coordinates and an honest verdict on whether the trip is worth it.
Related guides from the blog
