miro
MB Enthusiast
I first did this mod to the earliest SLK R171.
=========================================================
NOTE: if you are doing the rain sensor you may as well do a dimming mirror.
=========================================================
a) Every R171 SLK can have a rain sensor installed
b) Some cars were shipping with rain sensor and no rain sensor activation (not many)
c) After battery disconnect the function is lost. Needs activation. Same for new glass.
d) Removing the light sensor takes 3 seconds. Removing the gel goo takes about 10 minutes if you do it with a lot of cleaning and make it very clean.
e) Installation of the upgraded sensor takes 20 seconds but be very careful to align the component.
f) Coding page in the OCP is part of the sensor setup and calibration. The coding page is always needed for correct operation. Decoding the appropriate coding page is a task if you are not hooked up with a Diagnostic Guru. The only way around it is to find a car with the sensor, get the part number and see which coding page it uses.
g) gateway coding is also needed.
Same unit is used in the A-Class (169) SLK (171) and B (245) - check part numbers for other models.
Light and rain
----------------------------------
A 171 820 15 26 (code setting 28)
A 171 820 37 26 (code setting 30)
A 171 820 39 26 (code setting 32)
A 171 820 44 26 (code setting 52)
A 171 820 54 26 (code setting 53)
Light only
----------------------------------
A 171 820 30 26 (code setting 28)
A 171 820 38 26 (code setting 30)
A 171 820 40 26 (code setting 32)
A 171 820 45 25 (code setting 52)
A 171 820 55 26 (code setting 53)
Consult your local dealer for validation of which part is which function. Usually the higher number is the light sensor.
Since this time new code page numbers are in use for later part numbers.
The code setting is VERY important as it relates to a menu setting in the OCP (thing in the middle on the top of the windscreen)
Prices range from 52 Euro - 35 Euro for the units.
It appears that the reason why the activation doesnt work is that some cars only have a light sensor. The PCB is the same in all part numbers but the parts may be missing from the LIGHT ONLY sensor. Which means it has no way to operate as a RAIN SENSOR.
Mirror
Mirror removed
Sensor removed
Installed, coded and tested.
DIMMING MIRROR PART NUMBERS
=========================
Early R171
-----------
A 171 810 09 17 9051 Dimming
A 171 810 10 17 9051 Dimming with lights package
Later R171
-----------
A 171 810 13 17 9051 Dimming
A 171 810 14 17 9051 Dimming with lights package
Once you have all that done we can talk about passenger side parking aid for cars with no memory seats. This is where the passenger mirror tilts down on reversing.
=========================================================
NOTE: if you are doing the rain sensor you may as well do a dimming mirror.
=========================================================
a) Every R171 SLK can have a rain sensor installed
b) Some cars were shipping with rain sensor and no rain sensor activation (not many)
c) After battery disconnect the function is lost. Needs activation. Same for new glass.
d) Removing the light sensor takes 3 seconds. Removing the gel goo takes about 10 minutes if you do it with a lot of cleaning and make it very clean.
e) Installation of the upgraded sensor takes 20 seconds but be very careful to align the component.
f) Coding page in the OCP is part of the sensor setup and calibration. The coding page is always needed for correct operation. Decoding the appropriate coding page is a task if you are not hooked up with a Diagnostic Guru. The only way around it is to find a car with the sensor, get the part number and see which coding page it uses.
g) gateway coding is also needed.
Same unit is used in the A-Class (169) SLK (171) and B (245) - check part numbers for other models.
Light and rain
----------------------------------
A 171 820 15 26 (code setting 28)
A 171 820 37 26 (code setting 30)
A 171 820 39 26 (code setting 32)
A 171 820 44 26 (code setting 52)
A 171 820 54 26 (code setting 53)
Light only
----------------------------------
A 171 820 30 26 (code setting 28)
A 171 820 38 26 (code setting 30)
A 171 820 40 26 (code setting 32)
A 171 820 45 25 (code setting 52)
A 171 820 55 26 (code setting 53)
Consult your local dealer for validation of which part is which function. Usually the higher number is the light sensor.
Since this time new code page numbers are in use for later part numbers.
The code setting is VERY important as it relates to a menu setting in the OCP (thing in the middle on the top of the windscreen)
Prices range from 52 Euro - 35 Euro for the units.
It appears that the reason why the activation doesnt work is that some cars only have a light sensor. The PCB is the same in all part numbers but the parts may be missing from the LIGHT ONLY sensor. Which means it has no way to operate as a RAIN SENSOR.
Mirror
Mirror removed
Sensor removed
Installed, coded and tested.
DIMMING MIRROR PART NUMBERS
=========================
Early R171
-----------
A 171 810 09 17 9051 Dimming
A 171 810 10 17 9051 Dimming with lights package
Later R171
-----------
A 171 810 13 17 9051 Dimming
A 171 810 14 17 9051 Dimming with lights package
Once you have all that done we can talk about passenger side parking aid for cars with no memory seats. This is where the passenger mirror tilts down on reversing.