Suspension upgrade

[ShellVpower]

Dear suspension gurus,

 

asking on behalf of a fellow friend, he has a current c class 1.8 turbo.

 

ride on lowered eibach springs only, shock absorbers are standard MB items. tires are on 35 profile 19 incher BBS rims

 

ride is not so good and harsh over Singapore roads, was thinking how to 'soften' the ride quality without reverting back to stock. will changing to good absorbers help?

 

I assume that your friend is driving a W204 C180 kompressor (engine code: M271.952) 115kW

Your friend is on factory stock shock absorber which means the following part numbers should be OE front shock absorber part numbers.

A 204 320 01 30

A 204 323 24 00

204 323 26 00

A 204 323 26 00

204 323 24 00

204 320 33 30

A 204 320 33 30

204 320 01 30

204 323 12 00

 

Please verify

If these are his shock absorbers, the lowered 30mm eibach coil springs which I presume your friend has Eibach PART#: E10-25-019-01-22 will not work with it.

 

Are you able to verify if the part numbers stated are correct?

[Volvobrick]

Got to ask yourself what is the purpose of the "Upgrade"?

Suspension design is a compromise between ride comfort and handling (unless on adjustable air springs/dampers). Thus the better the handling, lower the look, the less comfortable it becomes. Stick to stock if comfort is the main objective.

 

You can't have your cake and eat it in this case.

 

 

[Keithchue]

I assume that your friend is driving a W204 C180 kompressor (engine code: M271.952) 115kW

Your friend is on factory stock shock absorber which means the following part numbers should be OE front shock absorber part numbers.

A 204 320 01 30

A 204 323 24 00

204 323 26 00

A 204 323 26 00

204 323 24 00

204 320 33 30

A 204 320 33 30

204 320 01 30

204 323 12 00

 

Please verify

If these are his shock absorbers, the lowered 30mm eibach coil springs which I presume your friend has Eibach PART#: E10-25-019-01-22 will not work with it.

 

Are you able to verify if the part numbers stated are correct?

nope, he is driving the 1.8 turbo, not the compressor model with the 7g box..

 

the eibach are just lowered springs. I think the part numbers are correct, but not the car model.

[ShellVpower]

nope, he is driving the 1.8 turbo, not the compressor model with the 7g box..

 

the eibach are just lowered springs. I think the part numbers are correct, but not the car model.

 

(W204) C 180 CGI (204.046) 115kW 1796cc

(W204) C 180 CGI (204.049) 115kW 1796cc

(W204) C 200 CGI (204.048) 115kW 1796cc

(W204) C 250CGI (204.047) 150kW 1796cc

 

The part numbers of the shock absorbers are interchangeable.

The factory supplied shock absorbers will not work with the lowered eibach coil springs.

 

Your friend has to consult eibach which shock absorber should he fit. There are other brands like Bilstein designated for sports suspensions which can help.

 

Please do take note that lowering coil springs has to come with an increase in tensile strength to compensate the loss of 'buffer'. The shock absorbers that you fit together with it should also come with a reduction in stroke length and an increase in damping forces. This also mean that the compression buffer has to be changed as well. The compression buffer is the piece of synthetic rubber mounted to the piston rod that plays the role of an auxialiary coil spring to further retard the end stroke.

 

Your friend should consult Eibach on the shock absorbers he should be using and also the compression stop to reduce the harshness of his ride.

[Keithchue]

 

(W204) C 180 CGI (204.046) 115kW 1796cc

(W204) C 180 CGI (204.049) 115kW 1796cc

(W204) C 200 CGI (204.048) 115kW 1796cc

(W204) C 250CGI (204.047) 150kW 1796cc

 

The part numbers of the shock absorbers are interchangeable.

The factory supplied shock absorbers will not work with the lowered eibach coil springs.

 

Your friend has to consult eibach which shock absorber should he fit. There are other brands like Bilstein designated for sports suspensions which can help.

 

Please do take note that lowering coil springs has to come with an increase in tensile strength to compensate the loss of 'buffer'. The shock absorbers that you fit together with it should also come with a reduction in stroke length and an increase in damping forces. This also mean that the compression buffer has to be changed as well. The compression buffer is the piece of synthetic rubber mounted to the piston rod that plays the role of an auxialiary coil spring to further retard the end stroke.

 

Your friend should consult Eibach on the shock absorbers he should be using and also the compression stop to reduce the harshness of his ride.

hi, thanks for the information.. my friends just collected his new C class. I suggested to him to forget about swapping the springs as the new C class comes with agility select, changing to a set of coilovers with lowered springs will be against the agility select..

[ShellVpower]

hi, thanks for the information.. my friends just collected his new C class. I suggested to him to forget about swapping the springs as the new C class comes with agility select, changing to a set of coilovers with lowered springs will be against the agility select..

 

I think agility select is an electronic damping system which has to be decommissioned in order to fit lowering springs. Similar to the PASM (just found that it was re-branded from SACHS CDC; vehicle builders do rebrand parts as their own like Porsche dopplekupplung (PDK) 7 gang getriebe, BMW Active steering etc.) Don't change the springs. I am not sure if the shock absorber system is conected to a CANBUS which can affect other systems as well.The electronic dampers operate with a program to assist in helping to stiffen damping forces through solenoid valves built in shock absorbers. This valve is managed by programs that need to be decommissioned/overwritten to prevent it from interfering with tuning. Agility select should be a rebranded shock absorber system of which the supplier is unknown. Typical Mercedes Benz strategy.

[MYSUV]

The car manufacturers have complete set out to a baffle us with a something different types of suspension which is available for both front and rear axles.

[ShellVpower]

The car manufacturers have complete set out to a baffle us with a something different types of suspension which is available for both front and rear axles.

 

 

What are you trying to say?

[Jq1988]

for comfort ride and street ride, go for coilover, choose those reputable coilover, such as bilstein, koni or eibach...