KENTRY

Complaints about poor wiping effect of windshield wiper

Topic number LI82.30-P-059239

Version 1

Design group 82.30 Windshield wipers

Date 06-23-2014

Validity All passenger car model series

Reason for change Validity updated and work instructions revised

Reason for block

Complaint:
There are several types of complaint about poor wiping effect.

A: The wiper blades make noises (scraping/ squeaking)
B: The windshield is not wiped completely (streaking)
C: During the downward movement water is pulled back onto the windshield from the A-pillar (Figure 1)

D: After windshield cleaning, water keeps spraying onto the windshield for several wipe cycles (Figure 2)

Attachments

File Description

Bild 1.JPG During the downward movement water is pulled back onto
the windshield from the A-pillar

Bild 2.JPG After windshield cleaning, water keeps spraying onto the
windshield for several wipe cycles

Bild 3.JPG Streaking due to excessive downforce of the wiper arm

Cause:

Re. A:

A1: The windshield and wiper blades are contaminated with residues from car washing facilities, identifiable by the
water beading. The water does not bead on a clean, unwaxed windshield.

A2: The wiper blades are worn by mechanical damage (wiper lip damaged by ice or insect debris, or deformed by
long periods of disuse).

A3: Incorrect angle of incidence of the wiper arms to the windshield. Because of this, the rubber lip of the wiper blade
may not flip over at the reversal point.

Re. B:

B1: Wax/ dirt residues on the windshield

B2: Wiper blades deformed or worn

B3: Downforce of wiper arm not OK (Figure 3)

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Re. C:

Water is pulled back onto the windshield by the differential pressure created as the wiper arm moves downwards.

Re. D:

Washer water collects in the fastening of the wiper blade and is blown onto the windshield by the airstream over se-
veral wipe cycles.

Note and supporting information: Wiper blades are wear parts which, even when "not used" for long periods (kept in
park position), may become permanently deformed and damaged. Further stresses on the rubber wiper blade arise
due to various environmental influences which progressively change the effectiveness of the rubber wiper blade and
accelerate the aging process. Due to the natural aging process and wear, the wiper blades should be replaced twice a
year, preferably in Spring and Fall (see operator's manual).

Remedy:
Re. A:

A1: Clean windshield with intensive cleaner A 000 986 40 71. Important: Do not clean the wiper blades otherwise the
graphite coating will be damaged.

A2: Replace wiper blades with genuine wiper blades

A3: Check angle of incidence of wiper arms. A correct angle of incidence of the wiper arms (position of the wiper bla-
des relative to the windshield) is essential for ensuring that the wiper blades flip correctly.

Re. B:

B1: Clean windshield with intensive cleaner A 000 986 40 71. Important: Do not clean the wiper blades otherwise the
graphite coating will be damaged.

B2: Replace wiper blades with genuine wiper blades.

B3: Check the wiper arm for excessive resistance in the bearing. Restore mobility or replace wiper arm if necessary.

Re. C:

Problem inherent in design for which there is no technical remedy.

Exception: X204 up to 02/2014. In these vehicles it is possible to install the design configuration of vehicles as of
02/2014. This includes wiper arms (styled arms) with improved behavior in this respect. It is also necessary to replace

the wiper blades because the styled arms feature a Top Lock connection (previously Side Lock). When installing the
passenger-side wiper arm, observe the new park position (21mm) via the marking on the windshield (Figure 4).

Note: The modification cannot be entered in the vehicle data card. The customer must be advised that, when procu-
ring replacement parts, wiper blades for the X204 as of 02/2014 must be ordered in future.

Re. D:
Problem inherent in design for which there is no technical remedy.
Note: - Check and adjustment tools case for windshield wiper systems, see SI182.30-P-0004A - Wipe quality and noise

behavior, see SI82.35-P-0002A - All about windshield wipers, see "AKUBIS-direct" SDmedia under the heading "Elec-
trical system - Windshield wipers" - W&G policies, see SI82.30-P-0010A

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If problems continue to occur in isolated cases even after the criteria described above are taken into account, we
would ask you to contact us in order to discuss further details and courses of action.

Attachments

File Description

Bild 4.JPG Park position of tip of blade on X204 passenger-side wi-
per arm with Top Lock

Symptoms

Overall vehicle / Cleaning system / Windscreen wiper / Rubs/grabs

Overall vehicle / Cleaning system / Windscreen wiper / Too loud

Overall vehicle / Cleaning system / Windscreen wiper / Arm deformed/broken

Parts
Part number ES1|ES2 |Designation Quantity |Note EPC Other|
ma-
ke
part
A 000 986 40 71 Windshield cleaner 1 The windshield cleaner must x
not come into contact with pla-
stic or painted parts otherwise
they could be damaged.
‘A 204 820 16 44 Left wiper arm 1 Left wiper arm with Top Lock xX
(Only for X204 up to 02/2014
when retrofitted, standard as of|
02/2014)
‘A 204 820 17 44 Right wiper arm 1 Right wiper arm with Top Lock | X
(Only for X204 up to 02/2014
when retrofitted, standard as of|
02/2014)
‘A 204 820 14 00 Wiper blades parts kit 1 Parts kit for wiper blades with xX
Top Lock.
(Only for X204 up to 02/2014
when retrofitted, standard as of|
02/2014)
WIS-References
Document number Title Note Allocation
$182.30-P-0004A Check and adjustment tools Remedy
case for windshield wiper
systems
$182.35-P-0002A Wipe quality and noise de- Remedy
velopment
$182.30-P-0010A Warranty and goodwill poli- Remedy
cies for wiper blades
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Validity

Vehicle Engine Transmission
124 (124) * *
156.902 * *
156.903 * *
156.905 *
156.908

156.912

156.943

156.944

156.945

156.946

156.952

190 (201)

205.002

205.003

205.004

205.008

205.009

205.012

205.036

205.037

205.040

205.041

205.042

205.045

205.049

205.066

205.142

205.145

205.204

205.208

205.212

205.240

205.242

205.245

207.301

207.302

207.303

207.304

207.322

207.323

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207.326
207.334
207.336
207.347
207.348
207.355
207.356
207.357
207.359
207.361
207.362
207.365
207.372
207.373
207.388
207.401
207.402
207.403
207.404
207.422
207.423
207.426
207.434
207.436
207.447
207.448
207.455
207.456
207.457
207.459
207.461
207.462
207.465
207.472
207.473
217.382
218.303
218.323
218.326
218.355
218.359
218.373
218.374

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218.375
218.376
218.391
218.392
218.393
218.394
218.903
218.923
218.959
218.973
218.974
218.975
218.976
218.991
218.992
218.993
222.004
222.032
222.033
222.057
222.077
222.082
222.085
222.104
222.123
222.132
222.133
222.157
222.162
222.163
222.165
222.167
222.176
222.177
222.178
222.179
222.182
222.185
242.848
242.890
246.200
246.201
246.203

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246.207
246.211
246.212
246.242
246.243
246.244
246.247
A (168)
A (169)
A (176)
B (245)
C (202)
C (203)
C (204)
CL (140)
CL (215)
CL (216)

CLA (117)

CLK (208)

CLK (209)

CLS (219)
E (210)
E (211)
E (212)
GL (164)
GL (166)

GLK (204)
M (163)
M (164)
M (166)
R (251)
S (126)
(140)
S (220)
S (221)
SL (107)
SL (129)
SL (230)
SL (231)

SLK (170)

SLK (171)

SLK (172)

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Full model designation breakdown ( 1000 / 2452 )