Well the engine and gearbox are now fixed in place. The only picture I have at the moment is pre-wiring mayhem. I completely stripped down the loom and integrated the ME2.8 wires into the ME2.0 wires. In most cases the CLK55 engine harness was too short to reach the ECU box so there was a fair amount of soldering involved.
I can report the wiring was not so hard with the aid of wiring diagrams and a meter.
All the coolant hoses have been reattached. I hhad to buy a new top hose for the radiator and just had to shorten the V6 lower radiator hose to fit. Original aircon hoses were used as those had plenty of slack in them to reach. A new aircon condenser radiator was installed. The V6 coolant radiator although the same size as the V8 is slightly different in design as it is a later design specifically for the later M112 engine. New flexible transmission cooling hoses were needed also although these were replaced due to the original ones showing signs of seepage at the swaged ends.
I've received my SL500 ECM from ECU Decode Ltd now in a "as new" state. Just need to be installed and after 40 starts should "marry" to the DAS2b immobiliser and the version coding downloaded onto it. I believe the code should be something like:
161 024 014
Which according to the EPC footnote 182 includes the following option codes:
828 - ELIMINATION OF EXHAUST EMISSION CONTROL SYSTEM (CAT) (FOR R129 ONLY) - I believe this means that there are only 2 cats not 4 and no post cat O2 sensors.
918 - EMISSION CONTROL SYSTEM UNREGULATED -I believe this means the absence of secondary air injection pump and the other sensors involved that found their way on later vehicles fitted with either the M112 or M113 engines.
423 - Automatic gearbox 5 speed /NAG 1
Also against the ECU part number, footnote 697 states that the ECU:
"part is only or also supplied as a reconditioned part".
For the transmission ecu (ETC) I have a E430 unit which should be encoded with a diff ratio of 2.82. These units are also version coded with STAR but I can find no information on what the coding actually translates into. Interestingly an error code is generated if the version coding is found to be incorrect and limp mode will occur.
Apart from the electronics I have two other major hurdles. The exhaust downpipes need to be extended towards the exhaust manifold. For now I can chop a section out and put in a temporary flexi section to get me to an exhaust shop for a permanent welded section. The second big hurdle is I have no prop shaft yet
My original puny V6 shaft although the same diameter as the V8 shaft has a smaller UJ and the end flanges are smaller. I bought a used sl500 shaft but that isway too short,I imagined it might be a few cm short but not to this degree...
It looks as though the older M119 V8 and W140 diff of the 96-97 SL500 made for a far shorter propshaft!
There are two late 98-2002 sl500 propshafts in the States on Ebay but neither breaker will ship internationally
So I could end up getting the SL500 propshaft I have lengthened at a specialist driveshaft builder.
I can report the wiring was not so hard with the aid of wiring diagrams and a meter.
All the coolant hoses have been reattached. I hhad to buy a new top hose for the radiator and just had to shorten the V6 lower radiator hose to fit. Original aircon hoses were used as those had plenty of slack in them to reach. A new aircon condenser radiator was installed. The V6 coolant radiator although the same size as the V8 is slightly different in design as it is a later design specifically for the later M112 engine. New flexible transmission cooling hoses were needed also although these were replaced due to the original ones showing signs of seepage at the swaged ends.
I've received my SL500 ECM from ECU Decode Ltd now in a "as new" state. Just need to be installed and after 40 starts should "marry" to the DAS2b immobiliser and the version coding downloaded onto it. I believe the code should be something like:
161 024 014
Which according to the EPC footnote 182 includes the following option codes:
828 - ELIMINATION OF EXHAUST EMISSION CONTROL SYSTEM (CAT) (FOR R129 ONLY) - I believe this means that there are only 2 cats not 4 and no post cat O2 sensors.
918 - EMISSION CONTROL SYSTEM UNREGULATED -I believe this means the absence of secondary air injection pump and the other sensors involved that found their way on later vehicles fitted with either the M112 or M113 engines.
423 - Automatic gearbox 5 speed /NAG 1
Also against the ECU part number, footnote 697 states that the ECU:
"part is only or also supplied as a reconditioned part".
For the transmission ecu (ETC) I have a E430 unit which should be encoded with a diff ratio of 2.82. These units are also version coded with STAR but I can find no information on what the coding actually translates into. Interestingly an error code is generated if the version coding is found to be incorrect and limp mode will occur.
Apart from the electronics I have two other major hurdles. The exhaust downpipes need to be extended towards the exhaust manifold. For now I can chop a section out and put in a temporary flexi section to get me to an exhaust shop for a permanent welded section. The second big hurdle is I have no prop shaft yet
My original puny V6 shaft although the same diameter as the V8 shaft has a smaller UJ and the end flanges are smaller. I bought a used sl500 shaft but that isway too short,I imagined it might be a few cm short but not to this degree...
It looks as though the older M119 V8 and W140 diff of the 96-97 SL500 made for a far shorter propshaft!
There are two late 98-2002 sl500 propshafts in the States on Ebay but neither breaker will ship internationally
So I could end up getting the SL500 propshaft I have lengthened at a specialist driveshaft builder.
