LI27.60-P-077704

Direct Selection Lever Module Cannot be Switched to Park Position "P" - Malfunction of "P" Button
Topic number
LI27.60-P-077704
Version
1
Function group
27.60 - Gearshift, control
Date
4/5/24
Validity
Valid for vehicles of model series 290 with DSI (center
gearshift) -> Vehicles up to modification year 22/2
Reason for change
Complaint
DSI selection lever module cannot be switched to park position "P" - malfunction of "P" button
Note: Vehicle can still be placed into park by opening driver's door, or turning off ignition. Please refer to operator's
manual section, "Engaging park position P," for additional instructions.
Cause
Possible causes:
1.
2.
Contamination/ingress of dust
Short circuit due to ingress of water
Remedy
Clean printed circuit board under plastic housing and button "P":
1.
2.
3.
4.
5.
6.
7.
8.
Remove DSI (AR27.60-P-0901FRX)
Remove housing of DSI (see picture 1)
Remove cover around "P" button above printed circuit board (see picture 2)
Check printed circuit board: Liquid residues and/or contamination (cf. picture 3)
Check "P" button: Water residues and/or contamination (cf. picture 4)
Carefully clean the affected areas (using contact cleaner)
Reassemble and check the functionality
If fault code still present after rework -- open TIPS Case
NOTE: The information contained in this document is intended for use by trained, professional technicians with the
knowledge to properly and safely perform diagnosis and repairs on Mercedes-Benz vehicles, using Mercedes-Benz
approved tools and equipment. It informs service technicians about conditions that could occur in certain vehicles and
provides information that could assist in proper vehicle diagnosis, service, or repair. It does not indicate that a defect
is present in any vehicle referenced in this document nor does it imply warranty coverage. DO NOT assume that a
symptom or condition, or a described cause of a symptom or condition, affects any particular vehicle or groups of ve16.04.2024 17:52
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hicles, or that a described repair applies to any particular vehicle or groups of vehicles. There can be multiple causes
resulting in the same or similar symptoms or conditions described in this document, and trained professional service
technicians must use their diagnostic skills to make evaluations on a case-by-case basis. The information contained
in this document does not guarantee warranty coverage nor does it extend the vehicle’s warranty in any way.
Attachments
File
Description
Bilder Abhilfe Mittelschaltung DSI.pdf
Photos of Direct Selection Interface & Circuit Board
WIS-References
Document number
Title
Note
AR27.60-P-0901FRX
Remove DSI center gearshift
Remove DSI center gearshift
Symptoms
Power transmission > Automatic transmission > Drive position selection > Function > Gear cannot be engaged
Control unit/fault code
Control unit
Fault text
N150 - DIRECT SELECT interface (DSI) (DSI290)
P085015 - The button 'Gear range P' has a malfunction.
There is a short circuit to positive or an open circuit.
P085011 - The button 'Gear range P' has a malfunction.
There is a short circuit to ground.
Operation numbers/damage codes
Op. no.
Operation text
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© Copyright Mercedes-Benz AG
Time
CCUSHWA
Damage
code
Note
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