Remove/Install Front Bumper - AR88.20-P-2000GQ

MODEL 166 

	Risk of injury  from engine start by remote start function	Prior to starting work, open engine hood, do not reach into rotation range or hazard area of freely rotating parts, wear closed and snug-fitting work clothes	AS00.00-Z-0024-01A
	Information on preventing damage to electronic components due to electrostatic discharge		AH54.00-P-0001-01A
	General information on the impact absorber		AH88.20-P-1000-01A
	Remove/install
1	Disconnect battery ground cable	Model 166 with code U60 (Active Bonnet (Pedestrian protection))	AR54.10-P-0003GZ
2	Open engine hood		AR88.40-P-1000GQ
3	Remove cover (1)
4	Remove expansion rivets (2)	Clip remover	Figure
5	Detach left and right front section on fender liner in area of bumper		AR88.10-P-1310GQ
		Clip remover	Figure
6	Unscrew bolt (5) on right and left inner fender flare	Model 166.874
7	Unscrew bolts from underfloor paneling on front bumper		AR61.30-P-1001GQ
8	Detach electrical connections (3)	The number of electrical connectors (3) differs depending on the vehicle equipment.
9	Unclip hose for AIRMATIC on right side	Model 166 with code 489 (AIRMATIC)
10	Loosen left and right bolt (4a)
11	Loosen left and right bolt (4b)	Model 166.8
12	Loosen left and right bolt (4c)
13	Unhook bumper at sides and remove toward front	Carefully unhook front bumper. Otherwise the retaining lugs on the front bumper can be damaged. Helper required.
14	Install in the reverse order
	Check
15	Check front bumper pedestrian protection sensor	Model 166 as of model year 2016 with code U60 (Active Bonnet (Pedestrian protection))	AH91.60-P-0001-01A
	Notes on pedestrian protection sensor	Check freely visible points for damage of any kind (cracks, holes, breakovers, etc.) when installed. ↓ If damage is visible, always replace pedestrian sensor. Remove/install pedestrian protection sensor	AR91.60-P-0950GQC
16	Adjust bumper		AR60.00-P-0700-01GQ
		Gap dimension	*BE60.00-P-1002-01Z
		Gap dimension	*BE60.00-P-1001-01Z
		Feeler gauge	Fig 1
17	Switch on ignition and PARKTRONIC, engage reverse gear and release parking brake	Model 166 with code 220 (PARKTRONIC) Model 166 with code 235 (Active Parking Assist with PARKTRONIC)
18	Check PARKTRONIC operating state	Model 166 with code 220 (PARKTRONIC) Model 166 with code 235 (Active Parking Assist with PARKTRONIC) PARKTRONIC automatically performs a self-test and operational readiness is signaled via the warning indicator.
19	Calibrate 360° camera with diagnostic system	Model 166 with code 501 (360° camera)	AD00.00-P-2000-04A

TEST AND ADJUSTMENT VALUES FOR GAP DIMENSIONS

Number	Designation				Model 166
BE60.00-P-1001-01Z	Gap dimension	Engine hood to fender	Dimension "A"	mm	3, 8 (±1)
		Engine hood to headlamp	Dimension "B"	mm	3, 9 (±1)
		Engine hood to bumper	Dimension "C"	mm	5, 4 (±1, 5)
		Fender to A-pillar	Dimension "D"	mm	3, 5 (±1)
		Front door to fender	Dimension "E"	mm	4, 3 (±0, 7)
		Front door to rear door	Dimension "F"	mm	4, 8 (±0, 7)
		Rear door to rear fender	Dimension "I"	mm	4, 3 (±0, 7)
			For picture, see		AR60.00-P-0700-01GQ

TEST AND ADJUSTMENT VALUES FOR GAP DIMENSIONS

Number	Designation				Model 166
BE60.00-P-1002-01Z	Gap dimension	Bumper to headlamp	Dimension "S1"	mm	3, 0 (±0, 5)
			Dimension "S2"	mm	3, 0 (±0, 5)
			Dimension "S3"	mm	3, 0 (±0, 5)
		Fender to headlamp	Dimension "R"	mm	3, 9 (±1)
		Engine hood to A-pillar	Dimension "Q"	mm	3, 5 (±1)
			For picture, see		AR60.00-P-0700-01GQ

Fig 1: Identifying Feeler Gauge (129 589 03 21 00)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Clip Remover (452 589 01 63 00)

Courtesy of MERCEDES-BENZ USA