Remove/Install Center Exhaust System - AR49.10-P-7283MRD

Engine 264 in model 213, 257 

Engine 274.9 in model 213 

Fig 1: Center Exhaust System Components Location - Engine 274.9 In Model 213 (Shown With Engine 274 With Single-Pipe Exhaust System)

Courtesy of MERCEDES-BENZ USA

Shown on model 213 with engine 274 with single-pipe exhaust system 

Courtesy of MERCEDES-BENZ USA

Shown on model 213 with engine 274 with twin-pipe exhaust system 

Fig 2: Center Exhaust System Components Location - Engine 264 In Model 213 (Shown With Code 598)

Courtesy of MERCEDES-BENZ USA

Shown on engine 264 in model 213 with code 598 (gasoline particulate filter (GPF) with sensor system) 

	Risk of burn injuries,  suffocation and poisoning when working on the exhaust system and the components connected to it. Risk of suffocation and risk of poisoning caused by inhalation of gaseous and solid components of the exhaust. Risk of poisoning  caused by skin contact with solid components of the exhaust.	Wear protective clothing and safety glasses. Use the extraction system. Move people out of the hazard area.	AS49.00-Z-0001-01A
	Risk of injury  caused by scraping or cutting body parts on sharp vehicle parts	Always wear protective gloves when working on or near sharp and non-deburred vehicle parts. Deburr repair panels.	AS00.00-Z-0017-01A
	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
	Notes on self-locking nuts and bolts		AH00.00-N-0001-01A
	Note on calculation of tightening torque when using insertion or socket tools with various effective lengths		AH00.00-P-0015-01CW
	Remove/install
1	Remove center and rear sections of lower engine compartment lining.	Engine 264, 274.9 in model 213	AR61.20-P-1105LWE
		Engine 264 in model 257 Only install center and rear lower rear engine compartment paneling again after leak test.	AR61.20-P-1105FR
2	Remove left and right underfloor paneling.	Engine 264, 274.9 in model 213	AR61.30-P-1001LWE
		Engine 264 in model 257	AR61.30-P-1001FR
3	Remove rear diagonal strut.	Bolt, rear reinforcement to frame floor assembly	*BA61.10-P-1004-01L
4	Remove NOx temperature sensor from center exhaust system (2).	Engine 274.9 in model 213 with code 920 (Direct fuel injection with stratified charging)	AR07.70-P-0006MRD
5	Remove NOx sensor from center exhaust system (2).	Engine 274.9 in model 213 with code 920 (Direct fuel injection with stratified charging)	AR07.70-P-0001MRD
6	Remove temperature sensor upstream of gasoline particulate filter (B163/4) and place to one side.	Engine 264 in model 213, 257 with code 598 (Gasoline particulate filter (OPF) with sensor system)	AR07.04-P-0070MRH
7	Unscrew union nuts (9) and place lines to one side.	Engine 264 in model 213, 257 with code 598 (Gasoline particulate filter (OPF) with sensor system) Coat thread with heat-resistant lubricating paste. Paste, hot lubrication 1 kg, DBL 6879.20	*BR00.45-Z-1005-06A
		Union nut, line, differential pressure sensor, gasoline particulate filter	*BA07.04-P-1003-02B
		Box wrench bit	Fig 3
8	Secure rear exhaust system against falling down.
9	Support center exhaust system (2).
	000 588 11 62 00 Major assembly mount		WS01.00-P-0092B
	000 588 10 62 00 Support plate		WS26.00-P-3309B
10	Remove screw (10).	Engine 264 in model 213, 257 with code 598 (Gasoline particulate filter (OPF) with sensor system) Screw, bracket of pressure line to gasoline particulate filter	*BA49.10-P-1017-02P
11	Remove the clamp (5).	Replace the clamp (5). Engine 264 in model 213, 257Clamp at catalytic converter and front exhaust system	*BA49.10-P-1002-02P
		Engine 274 in model 213Clamp at catalytic converter and front exhaust system	*BA49.10-P-1002-02G
12	Remove center exhaust system (2) from separating point (x1) or clamp of rear muffler (3).	Replace clamp.
		Engine 264 in model 213, 257Clamp, front exhaust system to rear muffler	*BA49.10-P-1003-02P
		Engine 274 in model 213Clamp, front exhaust system to rear muffler	*BA49.10-P-1003-02G
13	Remove center exhaust system (2) from bracket (6) and take out.	Helper required. Engine 264 in model 213, 257Nut, decoupling element for front exhaust system to bracket	*BA49.10-P-1010-02P
		Engine 274 in model 213Nut, decoupling element for front exhaust system to bracket	*BA49.10-P-1009-02G
	Clean
14	Remove combustion and corrosion residues from separating points.
	Check
15	Check decoupling element on bracket (6) for damage and wear.	If complaints are present, ↓ Install new decoupling element. Engine 264 in model 213, 257Nut, decoupling element for front exhaust system to bracket	*BA49.10-P-1010-02P
		Engine 274.9 in model 213Nut, decoupling element for front exhaust system to bracket	*BA49.10-P-1009-02G
16	Install in the reverse order.
17	Check installation position and unobstructed movement of the center exhaust system (2) and correct if necessary.	If complaints are present, ↓ Correct installation position of the center exhaust system (2).
	Risk of accident  from vehicle starting off by itself when engine running. Risk of injury  (bruises and burns) resulting from working on the engine while it is being started or when it is running.	Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
18	Perform engine test run and check exhaust system in terms of leak tightness.
19	Install center and rear lower engine compartment lining.	Engine 264, 274.9 in model 213	AR61.20-P-1105LWE
		Engine 264 in model 257	AR61.20-P-1105FR

Fig 3: Identifying Box Wrench Bit (000 589 70 03 00)

Courtesy of MERCEDES-BENZ USA