Recommended child restraint systems. Child safety locks
The Mercedes E-Class (4th generation W212, 2009–2016) offers a selection of recommended child restraint systems for every need. This article gives an overview of suitable systems and explains how the child safety locks work. These solutions ensure the highest level of safety and comfort for your children. Discover the tested recommendations from Mercedes-Benz.
Recommended child restraint systems
General Notes
Always also observe the notes on "Child restraint systems on the front passenger seat" and on "Correct positioning of the child restraint system".
For further information on the correct child restraint system, contact any Mercedes-Benz Service Center.
Recommended child restraint systems for installation with the vehicle seat belt
| Weight group | Manufacturer | Type | Approval number (E1 ...) | Order number (A 000 ...) | Automatic child seat recognition |
|---|---|---|---|---|---|
| Group 0: up to 10 kg up to approx. 6 months |
Britax Römer | BABY SAFE plus | 03 301146 04 301146 |
970 10 00 | yes |
| BABY SAFE plus II | 04 301146 | 970 20 00 | yes | ||
| Group 0+: up to 13 kg up to approx. 15 months |
Britax Römer | BABY SAFE plus | 03 301146 04 301146 |
970 10 00 | yes |
| BABY SAFE plus II | 04 301146 | 970 20 00 | yes | ||
| Group I: 9 kg to 18 kg approx. 9 months to 4 years |
Britax Römer | DUO plus | 03 301133 04 301133 |
970 11 00 | yes |
| 03 301133 04 301133 |
970 16 00 | no | |||
| 04 301133 | 970 21 00 | yes | |||
| Group II/III: 15 kg to 36 kg approx. 4 years to 12 years |
Britax Römer | KIDFIX |
04 301198 | 970 18 00 | yes |
| 04 301198 | 970 19 00 | no | |||
| 04 301198 | 970 22 00 | yes |
Recommended ISOFIX child restraint systems of the "Universal"/"Semi-universal" category
| Weight group | Size class | Manufacturer | Type | Approval number (E1 ...) | Order number | Automatic child seat recognition |
|---|---|---|---|---|---|---|
| Group 0+: up to 13 kg |
E | Britax Römer | BABY-SAFE plus | 03 301146 04 301146 |
B6 6 86 8224 | no |
| Group I: 9 kg to 18 kg |
B1 | Britax Römer | DUO plus | 03 301133 04 301133 |
A 000 970 11 00 | yes |
| 03 301133 04 301133 |
A 000 970 16 00 | no | ||||
| 04 301133 | A 000 970 21 00 | yes |
Child safety locks
Important Safety Notes
WARNINGWhen children are on board, they can
- open the doors and thereby endanger other persons or road users
- get out and be hit by traffic
- operate vehicle equipment and, for example, trap themselves.
There is a risk of accident and injury!
When children are on board, always activate the available child safety locks. When leaving the vehicle, always take the key with you and lock the vehicle. Never leave children unattended in the vehicle.
Child safety lock for
- rear doors
- rear side windows
If children are left unattended in the vehicle, they can set the vehicle in motion, for example by
- releasing the parking brake
- shifting the automatic transmission out of the P (Park) position or shifting the manual transmission into neutral
- starting the engine.
They may also operate vehicle equipment and become trapped. There is a risk of accident and injury!
Always take the key with you when leaving the vehicle and lock the vehicle. Never leave children unattended in the vehicle.
WARNINGIf people, especially children, are exposed to extreme heat or cold for extended periods, there is a risk of injury or even death! Never leave people, especially children, unattended in the vehicle.
WARNINGIf the child restraint system is exposed to direct sunlight, parts can become very hot. Children can burn themselves on these parts, especially on metal parts of the child restraint system. There is a risk of injury!
When you leave the vehicle with a child, always make sure the child restraint system is not exposed to direct sunlight. Protect it, e.g. with a blanket. If the child restraint system has been exposed to direct sunlight, let it cool down before you secure the child in it. Never leave children unattended in the vehicle.
Child safety lock for rear doors

Child safety lock on rear door (saloon example)
The child safety locks on the rear doors secure each door individually. A secured door cannot be opened from the inside. When the vehicle is unlocked, the door can be opened from the outside.
Lock: Move the child safety lock lever upward in the direction of the arrow
Check that the child safety lock works.
Unlock: Move the child safety lock lever downward in the direction of the arrowChild safety lock for rear side windows

Lock or unlock: Press the button
press.
The recommended child restraint systems for the Mercedes E-Class W212 (model years 2009–2016) are specially designed for maximum safety. They are precisely matched to the vehicle structure and meet the highest requirements for protecting young passengers.
Thanks to the integrated child safety locks for doors and windows, the E-Class offers additional safety in everyday use. This makes it the ideal choice for families who value comfort and protection equally.
Question: Which child restraint systems does Mercedes-Benz recommend for the E-Class W212?
Answer: Mercedes recommends systems from Britax Römer, including BABY SAFE plus, DUO plus and KIDFIX, depending on the child's weight class.
Question: What are the child safety locks on the doors and windows for?
Answer: They prevent children from opening doors or windows on their own and thereby putting themselves at risk.
Test yourself
A quick Mercedes-Benz E-Class quiz: every answer comes with an explanation and a link to the manual page.
