Mercedes
Compatibility tested by our community

OBD2 diagnostic scanner for Mercedes

Check engine light, AdBlue message or emissions fault on your Mercedes A-Class, C-Class, GLA or GLC? An OBD2 diagnostic scanner lets you read and clear fault codes yourself, without paying for a diagnostic at a garage. Designed and made in France, klavkarr supports many petrol, CDI diesel and hybrid Mercedes models. Check your vehicle's compatibility.

Compatibility tested on many Mercedes vehicles, from older generations to the latest models.

Find my Mercedes View all models
Made in France
Support from our own team
No subscription
Free updates
2-year warranty

Which Mercedes diagnostic tool should you choose?

Both read and clear fault codes. The 310 also covers ABS, airbag and ESP systems. Compare models

Why choose klavkarr?

Why use a diagnostic scanner for your Mercedes?

On CDI diesel Mercedes models, the AdBlue SCR system and diesel particulate filter are common sources of faults. klavkarr reads the specific code and displays live data, with explanations in English and no manufacturer-specific licence required.

Tested Mercedes compatibility

Every listed model has been tested by a user. Our database lists 4,601 car models, covering 12,195 versions and configurations.

Read & clear fault codes

Find out why a warning light is on and clear the code after fixing the fault, without booking an appointment.

Live data

Monitor performance and spot abnormal sensor readings, pressure or emission-control behaviour before a breakdown.

Plug straight in

Connect to the OBD2 port, with no dismantling or specialist mechanical knowledge required.

Plain-English fault codes

Fault codes explained clearly, without technical jargon or a manufacturer-specific software licence.

Updates included

New models and codes are added regularly, with no subscription.

On CDI diesel Mercedes models, common emissions-related fault codes include: P20EE for low SCR (AdBlue) catalyst efficiency, P2002 for low diesel particulate filter (DPF) efficiency, or P0401 for insufficient EGR flow. An OBD2 diagnostic check helps narrow down the cause before any repairs.

Whether you drive a A-Class, C-Class, E-Class, GLA, GLC or Sprinter, the OBD2 port is usually under the dashboard on the driver's side. klavkarr connects directly to it, with no dismantling or specialist tools required.

All Mercedes models compatible with our OBD2 scanner

Select your model generation to see supported warning lights and the recommended scanner.

Check the listed Mercedes petrol, diesel, hybrid and electric models equipped with an OBD2 port. Available functions depend on the vehicle.

Mercedes AMG

2 versions
AMG GT - 290 (2018 - 2021) AMG GT (2023 - ...)

Mercedes Citan

2 versions
Citan - 415 (2012 - 2021) Citan II - 420 (2021 - ...)

Mercedes CL

2 versions
CL Class - 215 (1999 - 2002) CL Class - 216 (2006 - 2013)

Mercedes CLA

2 versions
CLA Class - 117 (2013 - 2016) CLA Class - 118 (2019 - ...)

Mercedes Classe A

4 versions
A Class - 168 (2001 - 2004) A Class - 169 (2009 - 2012) A Class - 176 (2015 - 2018) A Class - 177 (2018 - ...)

Mercedes Classe B

4 versions
B Class - 245 (2005 - 2008) B Class - 245 (2008 - 2011) B Class - 246 (2012 - 2015) B Class - 247 (2018 - ...)

Mercedes Classe C

5 versions
C Class - 202 (1997 - 2000) C Class - 203 (2005 - 2007) C Class - 204 (2007 - 2010) C Class - 205 (2014 - 2018) C Class - 206 (2021 - ...)

Mercedes Classe E

5 versions
E Class - 210 (1995 - 1999) E Class - 211 (2006 - 2009) E Class - 212/207 (2013 - 2016) E Class - 213/238 (2016 - 2023) E Class - 214 (2023 - ...)

Mercedes Classe G

2 versions
G Class I - 463 (2000 - 2007) G Class II - 463 (2018 - ...)

Mercedes Classe R

1 version
R Class - 251 (2005 - 2010)

Mercedes Classe S

5 versions
S Class - 140 (1997 - 1999) S Class - 220 (1998 - 2002) S Class - 221 (2005 - 2009) S Class - 222/217 (2017 - 2020) S Class - 223 (2020 - ...)

Mercedes Classe T

1 version
T Class - 420 (2022 - ...)

Mercedes Classe V

3 versions
V Class - 638 (1999 - 2003) V Class - 639 (2003 - 2010) V Class - 447 (2014 - 2019)

Mercedes Classe X

1 version
X Class - 470 (2017 - 2020)

Mercedes CLC

1 version
CLC Class - 203 (2008 - 2011)

Mercedes CLE

1 version
CLE Class - 236 (2023 - ...)

Mercedes CLK

2 versions
CLK Class - 208 (1997 - 1999) CLK Class - 209 (2002 - 2005)

Mercedes CLS

3 versions
CLS Class - 219 (2008 - 2010) CLS Class - 218 (2014 - 2018) CLS Class - 257 (2018 - ...)

Mercedes EQA

1 version
EQA (2021 - ...)

Mercedes EQB

1 version
EQB (2020 - ...)

Mercedes EQC

1 version
EQC (2019 - 2023)

Mercedes EQE

1 version
EQE (2021 - ...)

Mercedes EQS

1 version
EQS (2021 - ...)

Mercedes EQT

1 version
EQT (2023 - ...)

Mercedes EQV

1 version
EQV (2020 - ...)

Mercedes GL

2 versions
GL Class - X164 (2006 - 2012) GL Class - X166 (2012 - 2016)

Mercedes GLA

2 versions
GLA Class - X156 (2017 - 2020) GLA Class - H247 (2020 - ...)

Mercedes GLB

1 version
GLB Class - X247 (2019 - ...)

Mercedes GLC

2 versions
GLC Class - X253 (2019 - 2022) GLC Class - X254 (2022 - ...)

Mercedes GLE

2 versions
GLE Class - 166/292 (2015 - 2018) GLE Class - 167 (2018 - ...)

Mercedes GLK

1 version
GLK Class - 204 (2012 - 2015)

Mercedes GLS

2 versions
GLS Class - X166 (2016 - 2019) GLS Class - 167 (2019 - ...)

Mercedes M/ML

3 versions
M/ML Class - 163 (2001 - 2005) M/ML Class - 164 (2005 - 2008) M/ML Class - 166 (2011 - 2015)

Mercedes Metris

1 version
Metris - 447 (2014 - 2019)

Mercedes SL

4 versions
SL Class - R129 (1989 - 2001) SL Class - R230 (2001 - 2006) SL Class - R231 (2012 - 2016) SL Class - R232 (2021 - ...)

Mercedes SLC

1 version
SLC Class - 172 (2016 - ...)

Mercedes SLK

3 versions
SLK Class - R170 (1996 - 2000) SLK Class - R171 (2004 - 2008) SLK Class - R172 (2011 - 2016)

Mercedes SLR

1 version
SLR McLaren - 199 (2003 - 2010)

Mercedes SLS

1 version
SLS AMG (2010 - 2014)

Mercedes Sprinter

3 versions
Sprinter - 903 (1995 - 2006) Sprinter - 906 (2006 - 2013) Sprinter - 907/910 (2018 - ...)

Mercedes Valente

2 versions
Valente - 639 (2010 - 2014) Valente - 447 (2019 - ...)

Mercedes Vaneo

1 version
Vaneo - 414 (2001 - 2005)

Mercedes Vario

1 version
Vario - BM667/668/670 (1996 - 2013)

Mercedes Viano

2 versions
Viano - 639 (2003 - 2010) Viano - 447 (2019 - ...)

Mercedes Vito

3 versions
Vito I - 638 (1999 - 2003) Vito II - 639 (2003 - 2010) Vito III - 447 (2014 - 2019)

EOBD legislation requires vehicles to be compliant from specified dates, depending on their category and market. Learn more in our introduction to OBD or the reference article on on-board diagnostics.

Most common OBD fault codes on Mercedes models

Standard OBD fault codes recorded by users of our klavkarr scanners.

P0410 Secondary Air Injection System Malfunction
P0301 Cylinder 1 Misfire Detected
P0101 Mass or Volume Air Flow Circuit Range/Performance Problem
P0170 Fuel Trim Malfunction (Bank 1)
P0087 Fuel Rail/System Pressure - Too Low
P2BAC

Where is the OBD2 port in your Mercedes?

The OBD2 port is usually under the steering wheel. klavkarr plugs straight in, with no dismantling or special tools required.

Find my OBD2 port
€30–120

That is the cost of a diagnostic at a garage each time a warning light comes on. With your own klavkarr, scans are unlimited and cost nothing extra; it can pay for itself from the first use.

Other compatible makes manufactured in Germany

klavkarr works across makes. Explore other manufacturers.

Audi Audi BMW BMW BMW Moto BMW Moto MAN MAN Opel Opel Porsche Porsche Smart Smart Volkswagen Volkswagen