Replacing engine wiring harness, throttle body, and more on the SL320 (R129)

Last time it was mounts, this time it's sparkplugs and the engine wiring harness 1993 - 1995 Mercedes-Benz from the factory had a harness with biodegradable insulation. Some of them were fixed under warranty (if the original owner still had the car). Some have had the harness replaced. Mine is all original. There are 3 areas/harnesses impacted: engine wiring harness throttle body lower wiring harness (not addressed here) This video shows the following: Valve cover gaskets replaced (seals around spark plugs leaking) New spark plugs Replaced throttle body with ProgRama rebuilt part Replaced engine wiring harness w/ Delphi rebuilt part New ignition coils Did it all work out? Did the car even start after all this? You'll have to watch to find out 🙂 Please note: I'm not a mechanic. Working on cars is a hobby that I do in my free time. Apologies in advance for messing up any terminology, etc. Time stamps Day 1 intro (0:00) Before - engine running (2:08) Taking off the air intake and spark plug cover (2:27) Inspect the coils (3:15) Change of plans; lets do valve cover gasket (6:57) Taking the valve cover off (8:56) Inspecting the valve cover (12:37) Put on the new gaskets (14:08) Valve cover back on (15:43) Looking at shop manual for notes (16:47) Bolting down valve cover (17:18) Replacing spark plugs (18:07) Day 2 intro (18:51) Getting to throttle body (19:07) Taking out the throttle body (21:21) New throttle body installed (23:05) Starting off the engine wiring harness (25:03) Last part of engine wiring harness (27:45) Final cleanup (28:59) Wrenching Pro-tip (29:22) Starting the ignition coil replacement (29:52) All coils installed (30:28) Starting the car;does it work? (30:29) Outro (32:54)

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Restoring the audio wiring back to factory spec on the 1994 SL320 (R129)

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Buying a 1992 to 1996 Mercedes: Don't Be Afraid of the Wiring Harness Issue

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M119 Installing Upper Engine Wiring Harness, Throttle Valve, and Mass Air Flow Sensor

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New car walk-around: 1994 SL320 (R129). Includes center console repairs

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Replace the bogus wiring harness in a 1994 Mercedes SL600...What we're they thinking?!?

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Mercedes 300SL R129 Ignition Parts M104 (some W124)

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1991-96 Mercedes Engine Wiring Failure Alert: Models and Years Affected

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Excellent R129 at Omega! The CAR WIZARD gets to drool over this 2000 SL500 Mercedes

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Changing my biodegradable wiring harness on the w124 E500 Renntech, Thanks Mercedes !

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CUSTOMER BUYS - Legendary R129 Mercedes SL 320, back to mechanical best! WHAT DO WE FIND!? HOW MUCH?

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Another customer scammed! CAR WIZARD shows why this '94 Mercedes SL600 is needing 15K to get sorted!

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Brian's SL500 R129. Throttle body removed for rewiring.

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Mercedes M119 Engine Hesitation Issue Solved (SL R129)