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Jeremy5848 · #9 12-19-2009, 02:32 PM

Quote:

Originally Posted by Sev

forgot to mention, on w124's, they all had heated mirrors. even the most poverty of poverty models. before the w124 came out, some 190e's were reported to not have them. but all 190e's with the w124 mirrors (after 87) had them for sure . . .

I'm amazed at how many 124 'features' first appeared on the 1984-85 201 models. The 1986 W124 "Introduction into service" manual, which includes the 300D Turbo, in many places refers the reader to the 201 model in the "Introduction" for an earlier year. In 1986, the chapter on the 603 engine is specifically entitled "Modifications as compared to engine 601."

For example, the electronic idle control is "known from engine 601 model year 1985" (i.e., the W210 190D 4-banger diesel). The OM603 engine is mostly an OM601 with two more cylinders and a turbocharger; many of the bits and pieces crossed over to the bigger engine without change (good to know at the junkyard!).

Another similarity is in the instrument cluster: "The indicating instruments and lamps are functionally the same as on model 201 model year 1985." However, "an exterior lamp failure indicator has been added" so the 124 does have some changes, additions, and improvements over the 201.

It can be frustrating for us late-comers that Mercedes doesn't repeat things and assumes you have a complete set of all Mercedes manuals.

For the 1987 300D Turbo, that means at least back to the earlier 300D (W123, OM617). For example, the EGR computer and OVP relay from the 1985 300D-T are also used on the 1986-87 300D Turbo. The computer has a different part number but the function is the same except for the addition of electronic idle speed control of the 1986-87 IP. Similarly, the ALDA, engine overload protection, and fuel rack position sensor from the OM617 engine were carried over to the OM603 engine. All of these descriptions tend to show up in the "Introduction" manuals and often nowhere else.

Caveat: Later W124 models (300D 2.5, etc.) definitely had many changes. My comments are strictly applicable only to the 1986-87 300D Turbo. YMMV.

Jeremy