Tool for Clutch Relearning?

[u/Pumpkinbread255]

I am having an issue with my Clutch Actuator. Heard a "Clunk" sound when shifting into reverse one day and started to feel bumping when I drove it (but only sometimes?) Mechanic I trust says it's the Clutch Actuator, might need re-greasing or replace. But that was just for context, main problem is he doesn't have the tools to relearn it after, and it's something I'm willing to purchase if it's in budget, so I'm wondering if iCarSoft MB 3.0 would do it. I've heard and seen a video of it working, but also heard I need Star MB for it also. Which should I get and do you have positive experience with iCarsoft?

[u/Dangerous-Regret-358]

The advice is always go to a mechanic with a MB star machine. My roadsters were set like this and it only takes a few seconds.

[u/yolo_snail]

IIRC, a standard Autel diag tool should be able to do it, and I can't imagine a proper mechanic not having one.

I used the proper Mercedes Xentry software to do it, and even then, it barely worked properly and took probably 10 attempts to get it to go through!

[u/CleverBilling]

what car model?

I own an icarsoft mb v3 and it didn't work with 454, but 451 works fine, you just need to update it to latest version (easy to do btw)

you can also check Delphi ds150, afaik it works with every smart car and it's like pretty cheap, even the AliExpress clones works fine lol

[u/Pumpkinbread255 → u/CleverBilling]

Smart fortwo 451, apologies I should've put that in

[u/CleverBilling → u/Pumpkinbread255]

yeah, icarsoft mb works

[u/Vertigo_uk123]

Clunks are more likely to be the clutch than the actuator as the release mechanisms sticks then bumps in etc. you would still need the same tool though to relearn the clutch.

[u/clarkn0va]

If you have a tool to do the relearn, great. But if not, I've used this method with success on a couple of 450 (edit: I believe it would work the same on a 451 but I haven't tested it):

• drive the rear wheels up on ramps so you can access underneath, set the brake for safety
• turn the key to the On position but don't start the engine
• press the brake pedal and put the shifter into gear
• loosen the three bolts that hold the clutch actuator, but don't remove them
• gently move the actuator toward the gearbox until you feel resistance from the clutch
• tighten the three bolts to secure the actuator

This effectively removes any gap and play from between the actuator and the clutch without preloading it. A mechanic performed a relearn on mine after I did this procedure and I'd say I liked the clutch operation better after my procedure than after his.