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#1
07-09-2025, 01:29 AM
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W210 OM606TD swap from Sedan to Wagon
Trying to find some information on doing an OM606[turbo] complete engine swap from a 1999 w210 sedan (whole car available for sacrificing) into a nice rust free pre-facelift RWD s210 wagon. I'm coming up dry. (** No 4MATIC headaches **) Particular emphasis in regard to electronics integration, fuel tank, fuel lines, SLS, IP, drivetrain, etc, etc. Considering that this vehicle existed outside of the NA market, in my head it seems that it should be a fairly straight forward integration other than the fuel tank but perhaps not the case.
Any input or suggestions would be greatly appreciated! P.S. - sorry if there's countless threads on this, I just couldn't find them.
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Always in search of a 1987 300TD. (Red on red preferably, or diamond blue on blue) - Christian Last edited by MBCR87; 07-09-2025 at 01:42 AM. 
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#2
07-09-2025, 01:05 PM
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One thing you won't have between the sedan and wagon is a wagon Diesel fuel tank. I don't know how different a Diesel tank is from a gasoline tank. If you can use the gasoline tank, clean it thoroughly. Diesel will dissolve varnish in the gasoline tank.
Look into whether EIS and drive authorization in the wagon will work with the 606 ECU. It might get messy if you have to swap fobs, EIS, receivers, etc. Look into whether the M112 PS+SLS pump will work with the 606. IIRC 1999 E300s have ESP (vs ASR) so that should work. It can't be a big issue getting a glow light in the wagon cluster. There's an empty socket in the lower right corner but I don't know whether the contacts will automatically go live and whether there's a translucent lens or blocking plate. Sixto 05 E320 wagon 219k miles 99 SL500 69k miles
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#3
07-09-2025, 07:55 PM
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I figured the tank could be one of the more difficult tasks. Thanks for the insight! I will look into all of these things. Or just dive in head first!!
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Always in search of a 1987 300TD. (Red on red preferably, or diamond blue on blue) - Christian
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#4
07-10-2025, 11:25 AM
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You shouldn't need to swap tanks.
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.  [SIGPIC]..I also have a 427 Cobra replica with an aluminum chassis.
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#5
07-10-2025, 12:02 PM
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Transmission is another difference. 99 has PRND4321 shifter while facelift has PRND+- shifter. Shifters and TCMs are not interchangeable but I'm not aware of differences in wiring harness or TCM connectors.
Final drive is different with E300 having shorter gears. You'll get better mpg with gasser gears! Sixto 05 E320 wagon 219k miles 99 SL500 69k miles
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