For a service manual, Mercedes recently posted them all online free for use, here is a link to the 124 manual:

https://www.startekinfo.com/StarTek/outside/12264/?requestedDocId=12264

https://www.startekinfo.com/StarTek/outside/12264/Program/matrix.htm

As for the high idle issue:
My 190E would do this from time to time. I actually think its somewhat normal for the car to high idle (~1000rpms) on a cold-start. Once I get the car in gear and driving the idle returns to a normal 700-800 rpms.

__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!

(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k

You might possibly be looking at getting an other fuel distributor.
Its the thing that sits under your air cleaner that has all the hard fuel lines connected to it, if that ends up being the culprit, they are still easy to find.
they are prevalent in the pick n pull yards around. you can get one from a
190E 2.6
260E
300E
if you grab one from a yard, get the whole thing as a unit, air flapper and all
dont disassemble it down to its bare form, its easier to change out then, and less parts to take apart, I have had to do it to 2 diff. Mercedes over the years. cured the idle issues, and i also had problems at full throttle, it solved that too.

__________________
Live simply so others can simply live



07 E350 sport Wife's Daily
01 E320 sport My Daily
00 C230 Kompressor Our back up (new Arrival)

87 300D Turbo my Daily for 8 yrs. Selling to neighbor

82 GMC Jimmy (K5) 6.2 Diesel (my Wheeler)
73 Roadrunner 340ci My very first car, still own it