Page 3833 of 4133

 SI91.60-P-0002A
Service information on immobilization of a passenger-side airbag where a 
rearward mounted (reboard) child seat is fitted
17.3.99
MODEL 
 124, 126, 129, 140, 163, 168, 170, 202, 203, 208, 210, 215, 220, 463
Modification notes
18.11.00
Supersedes Service Information SI91.60-P-0002A dated 
15.11.00
Remove the SI SI91.60-P-0002A from your file
 It is recommended to place the child seat in the rear area if 
possible.
If, in exceptional cases, the owner wishes a rearward mounted child 
seat to be expressly attached on the front passenger seat, the front 
passenger airbag should be immobilized.
 
As a general rule, there is no approval for immobilizing the front 
passenger airbag on models fitted with ACSR, which is visible from 
the "airbag OFF" indicator light in the center console. On such 
models, an MB child seat with ACSR should be used for safety and 
cost reasons. 
-----------------------------------------------------------------------------------------
 
On models fitted with seat belt force limiter, it is essential for 
safety reasons to 
D
 program the front passenger ETR to "NO".
D
  unplug the connector at the front passenger ETR.
 
No provision is made for immobilizing the seat occupied 
recognition, the automatic child seat recognition (ACSR), as well as 
the side airbag and window airbag.
In the event that it is necessary to immobilize the seat occupied 
recognition and automatic child seat recognition (ACSR), for example 
if a Recaro seat is installed, this can be carried out in exceptional 
cases after agreement has been obtained from GSP/SPS, tel. 07031 
/ 90 - 81815.
-----------------------------------------------------------------------------------------
 
After immobilizing the front passenger airbag or additionally the 
ETR, it is essential to 
D
 have the customer sign the confirmation after immobilization.
D
  affix a sticker at a clearly visible point in the area of the front 
passenger airbag.
D
  affix a sticker in the Owner's Manual, in the section Airbag.
Carry out the remaining procedure as stated below.
-----------------------------------------------------------------------------------------
 Deactivation can be reversed at any time.
 Immobilization and re-activation must be entered in the 
vehicle documents!
The vehicle should be presented in such a case to a technical 
inspection center (DEKRA, TÜV). The completed confirmation 
should be submitted to the vehicle registration authorities for 
entry.
-----------------------------------------------------------------------------------------
Perform version coding / procedure
 Model
Version
Coding with HHT 
 2)
or STAR Diagnosis tool (DAS)
 Unplug 
connector of 
passenger side 
airbag 
 3)
Unplug 
connector of 
passenger side 
emergency 
tensioning 
 retractor
Insert 
replacement  resistor 
 3)
Passenger-side 
airbag
NO
Passenger side 
emergency 
tensioning 
retractor NO
124
All
--X-X
126
All
--X-X
129
up to 06/93
--X-X
129
as of 07/93 without ACSR
X-X--
140
up to 06/93
--X-X
140
as of 07/93 without ACSR
X-X--
140
as of 07/93 with ACSR 
 1)
-----
163
up to VIN 145263
--X-X
163
as of VIN 145264
-----
168
All
-----
170
without ACSR
XXXX-
170
with ACSR 
1)
-----
202
without seat belt force limiter
X-X--
202
as of 06/97 
 4) 
XXXX-
202
with ACSR 
1)
-----
203
All
-----
208
All
-----
210
without ACSR
XXXX-
210
with ACSR 
1)
-----
215
All
-----
220
All
-----
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        Page 3834 of 4133

 463
All
-----
1)
Recognition: existing "airbag Off" warning light in center 
console.
2)
 With HHT functions menu point 5 Coding Reboard child seat. If 
only the passenger side airbag is de-activated, then program 
menu point Vehicle equipment.
 3)
Depending on model and version, unplug one or two 
connectors at the passenger side airbag and insert the 
corresponding replacement resistors.
4)
 Without ACSR, with seat belt force limiter.
Immobilizing passenger side airbag certificate
Model 124, 126, 129, 140, 163 up to VIN 
145263, 170, 202, 210
 
Have customer sign certificate after 
immobilization
OF91.60-P-1000-01A
Cancel immobilization
D
 To re-activate the passenger side airbag remove the ignition 
resistor at the cable.
D
 Fit together connector at passenger side airbag.
D
 Fit together connector at passenger side ETR (on models fitted 
with seat belt force limiter).
 D
Use HHT or STAR Diagnosis tool (DAS) to re-program 
passenger side airbag and passenger side ETR in the SRS 
control module to "YES".
D
 Remove sticker on passenger side airbag and render invalid in 
Owner's Manual.
D
 Complete re-activation on certificate after immobilization.
D
 If re-activated, delete de-activation in vehicle documents.
Parts ordering notes
 Part no.
Designation
Quantity
140 868 00 50
Ignition resistor (replacement resistor)
as required
140 817 15 20
Sticker (without seat belt force limiter)
2
210 817 20 20
Sticker (with seat belt force limiter)
2
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        Page 3835 of 4133

 SI18.00-P-0010A
Service Information: oil sludge
26.3.01
ENGINE 
111 in MODELS 124, 163, 170, 202, 203, 208, 210
ENGINE 
 112 in MODELS 129, 163, 170, 202, 203, 208, 210, 220
ENGINE 
 112, 113 in MODEL 463
ENGINE 
 113 in MODELS 129, 163, 202, 208, 210, 215, 220
ENGINE 
 137 in MODEL 215, 220
ENGINE 
 166 in MODEL 168
Oil sludging in gasoline engines with ASSYST maintenance 
system
 Recently we have determined that time and time again oil 
sludging occurs in gasoline engines with an ASSYST maintenance 
system.
Oil sludging can lead to the following complaints:
 D
 engine oil consumption
D
 engine smoke (white/blue)
D
 influencing of oil level indicator
D
 clogged oil filter, engine oil thickened like jelly 
D
 Check engine lamp illuminated
D
 oil sludge visible during assembly job, e.g. in oil filter, in cylinder 
head covers, condensation sludging 
(engine 166) etc.
-----------------------------------------------------------------------------------------
 The following list of causes may lead individually or as a combination 
to engine oil sludging:
D
 Crankcase ventilation inoperable, function orifices, bores, 
passages in cylinder head cover, cylinder head, crankcase etc. 
are mechanically sealed. A nonfunctioning crankcase 
ventilation boosts loads on the engine oil through organic 
nitrates. The risk of oil sludging increases.
The mechanical condition of the engine is always to be 
checked, i.e. all engine oil drain orifices on the cylinder head 
and crankcase and all crankcase ventilation ducts must be free 
of obstacles. Crankcase breather lines may not be kinked. 
Check the ventilation bores in the cylinder head covers.
-----------------------------------------------------------------------------------------
D
 The engine oil used does not comply with the specifications in 
Sheet 229.1 or 229.3 of the Specifications for Service Products. 
The additive process, e.g. dirt-carrying capability, neutralization 
capability and oxidation resistance as well as the quality of the 
base stock influence sludging time.
Use of engine oils with best possible resistance to formation of 
sludge, i.e. use only tested and approved engine oils (from 
Sheet 229.1 or 229.3). The best protection is afforded by the 
engine oils on Sheet 229.3, which fulfill more stringent 
specifications with regard to preventing sludge and deposits 
(see Sheet 221.0, page 11). These oils have a distinctly better 
anti-sludge characteristic than other engine oils.
D
 Sludging after adding a fuel or engine oil special additive.
Do not use fuel or engine oil special additives. More information 
hereto is available on Sheet 219.0 of the Specifications for 
Service products. Reference to customer not to use special 
additives.
D
 Engine oil change not performed according to ASSYST 
specifications. At driven distances 
exceeding > approx. 3000 km, engine oil sludging may occur.
-----------------------------------------------------------------------------------------
 Comply with engine oil and filter change as under ASSYST 
specifications. Observe remaining distance.
D
 Fuel grade lies outside standard (regionally contingent). If 
contaminated, deficient fuel is used, then engine oil sludging 
may occur even where approved engine oil is used.
Operation with fuel, e.g. as under DIN EN 228. Clarify refueling 
behavior of customer. If engine operation regional, is 
temporarily possible with deficient oil only, then the startup 
distance has to be individually reduced, i.e. the oil change 
temporarily performed at an interval of, e.g. 10,000 km.
D
 Radiator antifreeze penetration into engine oil, e.g. through an 
internal engine leak (cylinder head gasket, casting porosity). 
The engine oil sludges within a short period. The crankcase 
ventilation clogs up and stops functioning. Condensation 
sludging clogs up the oil separator cells 
(engine 166).
Rectify coolant leakage. Clean all sludged engine parts, in 
particular the crankcase ventilation parts. If the occurrence 
repeats, and casting porosity is suspected, e.g. replace 
crankcase.
-----------------------------------------------------------------------------------------
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        Page 3836 of 4133

 Measures for slightly sludged engine:
 Oil and filter change. Purge engine, i.e. normal engine operation 
in neutral, or while driving, using oil from Sheet 229.3, 228.3, or 
228.5. Drain off scavenging oil after purging process (approx. 1 
hour). Repeat purging process if necessary. Refill using engine oil 
from Sheet 229.3, or 229.1. The first oil change after clearing the 
sludge should be performed after approx. 10,000 km or beforehand; 
when doing so use engine oil from Sheet 229.3.
Measures for severely sludged engine:
 Engines with severe oil sludging and caking onto engine parts 
and into bores have to be dismantled and mechanically cleaned. 
Tough sludge residue must not enter the clean side of the oil circuit, 
as otherwise, e.g. the piston oil spray and the hydraulic 
compensation elements may have their functionality impaired. Refill 
using engine oil from Sheet 229.3, or 229.1. 
The first oil change after sludging should be performed after approx. 
10,000 km; when doing so use engine oil from 
Sheet 229.3.
 Warranty/goodwill regulations
If in combination with engine oil sludging a warranty/goodwill claim is 
submitted, then a regular documentation of maintenance must be 
presented. The ASSYST printout is to be filed carefully for further 
reference. 
Oil sludging in combination with an exceeded oil change interval, or 
because of special additives in the fuel/engine oil are costs to be 
borne by the customer.
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        Page 3837 of 4133

 GF77.20-P-0001GH
Sliding /pop-up roof, function
28.2.97
MODEL 
163 with CODE (414a) Electric glass sliding/pop-up roof
P77.20-0381-06
1
Close sliding/pop-up roof (SR) 
2
 Open sliding roof
3
 Close pop-up roof
4
 Open pop-up roof
M12
 Sliding/pop-up roof (SR)
S13/2
 Switch (SR)
The sliding /pop-up roof is a combination of a sliding roof and pop-up 
roof. It is controlled by the motor for the 
 sliding /pop-up roof drive 
assembly (M12) 
 located on the sliding roof frame below the 
overhead control panel.
Two types of control are possible:
D
  Opening/closing sliding roof (sliding roof opens toward rear)
D
  Opening/closing pop-up roof
The sliding and pop-up roof cannot be opened simultaneously. 
Operation is controlled by the
  sliding/pop-up roof switch (S13/2) 
 in 
the overhead control module.
-----------------------------------------------------------------------------------------
 The following functions can be controlled with the switch:
D
 Closing 
 sliding /pop-up roof (1 or 3); the sliding roof or pop-up 
roof is closed depending on which is open.
D
 Opening 
 sliding roof (2); if the pop-up roof is open it is closed 
previously.
D
 Opening 
 pop-up roof (4); if the sliding roof is open it is closed 
previously.
-----------------------------------------------------------------------------------------
  
Sliding/pop-up roof (SR), location of 
components
GF77.20-P-0001-01GH
Closing sliding/pop-up roof (SR), function
GF77.20-P-2002GH
Opening pop-up roof, function
GF77.20-P-2003GH
Opening sliding roof, function
GF77.20-P-2004GH
Sliding/pop-up roof (SR) lock-up recognition, 
function
GF77.20-P-3000GH
Sliding/pop-up roof (SR) position 
measurement, function
GF77.20-P-3001GH
Synchronizing sliding/pop-up roof (SR), 
function
GF77.20-P-3002GH
Desynchronizing sliding/pop-up roof (SR), 
function
GF77.20-P-3003GH
Sliding/pop-up roof, location/purpose/ 
design/function 
GF77.20-P-4100GH
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        Page 3838 of 4133
 AR68.30-P-4610GH
Removing and installing spare wheel cover
28.4.99
MODEL 
163.174
P68.30-2161-06
1
Spare wheel cover front section
2
 Retaining straps
3
 Electric air pump
4
 Screws
5
 Spare wheel mount
6
 Bracket
7
 Screws
 
Removal, installation
1
Remove cargo space cover 
 See Owner's Manual.
2
Loosen retaining straps (2) and remove spare 
wheel cover front section (1)
3
Remove spare wheel
 
*BA40.10-P-1002-01A
4
Remove electric air pump (3)
5
Unscrew screws (4) and remove spare wheel 
mount (5)
 
6
Remove bracket (6)
 Turn in clockwise direction until bracket 
(6) releases at D-pillar. 
7
Remove rear wall on spare wheel cover
 2 screws.
8
Install in opposite order
 
Wheels
Number
Designation
Model 
163.174
BA40.10-P-1002-01A
Bolt for spare wheel on inside of spare wheel mount
Nm
50
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Page 1 
     
        
        Page 3839 of 4133
 AR68.30-P-4610GH
Removing and installing spare wheel cover
28.4.99
MODEL 
163.174
P68.30-2161-06
1
Spare wheel cover front section
2
 Retaining straps
3
 Electric air pump
4
 Screws
5
 Spare wheel mount
6
 Bracket
7
 Screws
 
Removal, installation
1
Remove cargo space cover 
 See Owner's Manual.
2
Loosen retaining straps (2) and remove spare 
wheel cover front section (1)
3
Remove spare wheel
 
*BA40.10-P-1002-01A
4
Remove electric air pump (3)
5
Unscrew screws (4) and remove spare wheel 
mount (5)
 
6
Remove bracket (6)
 Turn in clockwise direction until bracket 
(6) releases at D-pillar. 
7
Remove rear wall on spare wheel cover
 2 screws.
8
Install in opposite order
 
Wheels
Number
Designation
Model 
163.174
BA40.10-P-1002-01A
Bolt for spare wheel on inside of spare wheel mount
Nm
50
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Page 1 
     
        
        Page 3840 of 4133
 AR68.30-P-4610GH
Removing and installing spare wheel cover
28.4.99
MODEL 
163.174
P68.30-2161-06
1
Spare wheel cover front section
2
 Retaining straps
3
 Electric air pump
4
 Screws
5
 Spare wheel mount
6
 Bracket
7
 Screws
 
Removal, installation
1
Remove cargo space cover 
 See Owner's Manual.
2
Loosen retaining straps (2) and remove spare 
wheel cover front section (1)
3
Remove spare wheel
 
*BA40.10-P-1002-01A
4
Remove electric air pump (3)
5
Unscrew screws (4) and remove spare wheel 
mount (5)
 
6
Remove bracket (6)
 Turn in clockwise direction until bracket 
(6) releases at D-pillar. 
7
Remove rear wall on spare wheel cover
 2 screws.
8
Install in opposite order
 
Wheels
Number
Designation
Model 
163.174
BA40.10-P-1002-01A
Bolt for spare wheel on inside of spare wheel mount
Nm
50
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Page 1