Remove/install front bumper

AR88.20-P-2000W

Remove/install front bumper

09.02.2016

Model

172.4

Shown on vehicle up to model year 2016 with code 621 (Intelligent Light System (left-hand traffic))

1

Bumper

4

Expanding rivets

7

Bolts

2

Expanding rivets

5

Fender liner

8

Bolts

3

Fender liner

6

Expansion rivet

Shown on vehicle up to model year 2016 with code 621 (Intelligent Light System (left-hand traffic))

1

Bumper

11

Guide lugs

E2/3

Right daytime running lamps headlamp

9

Electrical connector

12

Bracket

X26/38

Front bumper and frame wiring harness electrical connector

10

Fender

E1/3

Left daytime running lamps headlamp

1

Bumper

13

Screw

14

Catch hook

15

Mounting rail



General information on the impact absorber

AH88.20-P-1000-01A

 

Remove/install

1

Disconnect ground line at the on-board electrical system battery

Model 172.4
with code U60 (Active Bonnet (Pedestrian protection))

AR54.10-P-0003W

2.1

Remove bottom engine compartment paneling at front

Model 172.4 with engine 152, 271, 274, 276

AR61.20-P-1105W

2.2

Remove bottom section of soundproofing at front

Model 172.4 with engine 651

AR94.30-P-5300W

3

Disconnect Electrical connection (9)

If installed.

 Number of electrical connectors (9) depending on vehicle equipment.

4

Remove expansion rivets (2, 4) from fender liner (3, 5) and expansion rivet (6) on left and right on bumper (1)

 Clip remover

*452589016300

5

Disconnect electrical connector on frame wiring harness and front bumper (X2638)

6

Detach fender liner (3, 5) only until bolts (7, 8) are accessible

 Mounting wedge

*110589035900

7

Remove bolts (7, 8)

8

Loosen bumper (1) from fenders (10)

 Installation: Guide bumper (1) into side bracket (12). Guide guide tabs (11) on bumper (1) into fender (10).

9

Unscrew bolts (13) from bumper (1)

10

Carefully loosen catch hooks (14) in sequence from mounting rail (15) starting at one side with screwdriver

 Guide screwdriver from the engine side into recesses (arrows) on mounting rail (15). Carefully pull bumper (1) toward front when detaching catch hooks (14).

11

Remove bumper (1) toward front with aid of helper

 Installation: Screw in bolts (13) up to contact surface only, as the gap dimensions must be checked and adjusted, if necessary, after the bumper (1) has been installed.



Check

12

Check front bumper pedestrian protection sensor for any kind of damage (cracks, holes, kins, etc.)

Model 172.4 as of 10/31/11
with code U60 (Active Bonnet (Pedestrian protection))



Notes on pedestrian protection sensor

AH91.60-P-0001-01A

If damage is visible.



Replace pedestrian protection sensor.

AR91.60-P-0950RK

13

Disassemble front bumper (1)

When replacing bumper (1).

Model 172
as of model year 2017

AR88.20-P-2050WM

Model 172.4
up to model year 2016

AR88.20-P-2050W

14

Install in the reverse order



Check

15

Check gap dimensions on bumper, adjust if necessary

AR60.00-P-0700-01V

Gap dimension

*BE60.00-P-1001-01Y

 Feeler gauge

*129589032100

Test and adjustment values for gap dimensions

Number

Designation

Model 172

BE60.00-P-1001-01Y

Gap dimension

Engine hood to fender

Dimension "A"

mm

4,0 (+1/-0,5)

Engine hood to headlamp

Dimension "R"

mm

4,0 (1)

Radiator grille to headlamp

Dimension "N"

mm

–

Engine hood to bumper

Dimension "B"

mm

4,0 (1)

Fender to headlamp

Dimension "C"

mm

4,0 (+1/-1,5)

Bumper to headlamp (circumferential)

Dimension "D"

mm

3,5 (1,5)

Mounting rail, bumper to engine hood

Dimension "I"

Outside

mm

39,5 (-1,0)

Center

mm

58,5 (-1,0)

Picture

AR60.00-P-0700-01V