Spark plugs & HV leads replacement manual for dummies needed! S202 C240 T-modell

[groo-bee]

Hello everyone.
I was looking trough the forum for this and i found it, but the link to "how to" materials is out of date.
Could you please help? Its my second Merc - i had W einhundert vier und zwanzig before, but now it's this V6 which i'm new to.
Please help, i hate when a merc engine is not running as smooth as whipped cream.
THX

 

[DREAMER NO2]

groo-bee Welcome to the forum .Well i would take you phone or camera and take pictures of the ht locations . Picture each lead and to where it goes. Then do one lead at a time uesing the same length as lead as the one you removed .

 

[DREAMER NO2]

groo-bee Welcome to the forum .Well i would take you phone or camera and take pictures of the ht routing . Picture each lead and to wher it goes .I found -this is your car a 2002 model ?

 

[DREAMER NO2]

Whats is the engine type ?

 

[LostKiwi]

Whats is the engine type ?

M112.

The only thing to beware of is making sure each plug lead goes back where it came from. Do one at a time.

You may need the lead removal tool. You can use a bent 17mm spanner. It will be clear when you look.

 

[EmilysDad]

Good job he's not asking for a Smart Roadster ....

 

[DREAMER NO2]

Are the plugs in the sump ,,,with engine out to check them

 

[EmilysDad]

Are the plugs in the sump ,,,with engine out to check them

Not far off .....
Three cylinders .... 6 plugs. 3 are easy. The other 3 require the back end panels to be removed to access them ..... and if a Brabus, the side skirts need removing too to allow removal of the panels

 

[LostKiwi]

Not far off .....
Three cylinders .... 6 plugs. 3 are easy. The other 3 require the back end panels to be removed to access them ..... and if a Brabus, the side skirts need removing too to allow removal of the panels

And even then one of the three difficult ones will cause a LOT of swearing....

 

[DREAMER NO2]

ED I read some place that engine will need removing to replace a simple wear item on the smart ..

 

[EmilysDad]

ED I read some place that engine will need removing to replace a simple wear item on the smart ..

that's probably an exaggeration .. though access isn't especially great

 

[LostKiwi]

ED I read some place that engine will need removing to replace a simple wear item on the smart ..

that's probably an exaggeration .. though access isn't especially great

Agreed. I can't think of any wear item that needs engine removing (thermostat is close though!)

Waterpump is a pita, starter motor worse, alternator not great either. Timing chain can be done by lowering the subframe but most use the opportunity to do a full rebuild.

 

[EmilysDad]

.... (thermostat is close though!)

and you're a thermostat expert

 

[LostKiwi]

and you're a thermostat expert

The moral being use genuine parts for anything that's hard to get to!

 

[EmilysDad]

The moral being use genuine parts for anything that's hard to get to!

At least a genuine thermostat isn't too expensive. The ECU controlled motorised valve that Citroen fitted to EmilysMum's C3 was about £170 (just to buy) 6 years ago

 

[LostKiwi]

At least a genuine thermostat isn't too expensive. The ECU controlled motorised valve that Citroen fitted to EmilysMum's C3 was about £170 (just to buy) 6 years ago

OM642 ones for mine aren't far off that....

 

[DREAMER NO2]

I dont think that Mercedes ever thought about user friendly replacement or repairs for any model that they produced ...

 

[groo-bee]

groo-bee Welcome to the forum .Well i would take you phone or camera and take pictures of the ht routing . Picture each lead and to wher it goes .I found -this is your car a 2002 model ? View attachment 72889

it's a 2000 - last year of production. S202 C240

 

[groo-bee]

M112.

The only thing to beware of is making sure each plug lead goes back where it came from. Do one at a time.

You may need the lead removal tool. You can use a bent 17mm spanner. It will be clear when you look.

there are respective markings on the block and the coil packs. "a" lead to the front of vehicle, "b" to th back