Suspension springs and upper support cups
Depending on the model and configuration, cars are equipped with two types of springs in combination with three types of upper support cups of different thicknesses.
The spring is matched to the support cup at the factory and must be maintained throughout the entire service life to avoid deterioration of the vehicle's stability and controllability. When replacing a spring or support cup, be sure to install parts identical to the previous ones.
Suspension spring characteristics
| Spring type | Spring number | Wire diameter, mm | Draft (P=100 kgf) | Length (P=0 kgf) |
| 1 | 123.324.1404 | 15,95 | 18,45 | 355 |
| 2 | 123.324.1504 | 14,95 | 21,5 | 337 |
Upper Spring Support Cup Characteristics
| Letter index | Cup number | Thickness of the bottom of the support cup, mm | Number of protrusions around the circumference of the cup |
| a | 115.325.2244 | 9,5 | 1 |
| b | 115.325.2344 | 14,0 | 2 |
| c | 115.325.2444 | 19,0 | 3 |
Shock absorbers
The cars use gas-filled, oil-filled, single-tube, double-action shock absorbers. They are connected to the body and suspension arms.
Control parameters of rear shock absorbers
Shock absorber number | Color marking | Rod output, mm | Shock absorber type | |
new | acceptable | |||
123.323.1700* | One white longitudinal stroke | 0,0—2,0 | 32,0 | Separating piston |
123.323.6000 | One white cross stroke | 0,0 | 32,0 | Without separating piston |
| 123.323.0800 | One white cross stroke | 105,0—107,0 | 82,0 | |
| 123.320.0413* | One white cross stroke | 147,0—149,0 | 137,0 | |
* Rarely encountered as a possible option.
Additional spring/shock absorber combination for various car models
Engine model | Spring No | Shock absorber no |
Without level adjustment | ||
| "200" | — | — |
| "230" | 123.324.1404 | — |
| "250" | — | 123.326.0600 |
| "280", "280E" | — | 123.326.0800 |
With level control | ||
| "200" | — | — |
| "230" | 123.324.1504 | — |
| "250" | — | 123.320.04113 |
| "280", "280E" | — | — |
Anti-roll bar
Characteristic | Meaning |
Stabilizer bar diameter, mm | |
| 13,0 (12,0)* |
| 14,5 (13,0)* |
* Data in brackets are for the coupe.
Body height regulator
The height adjustment device was installed on some models. It hydraulically adjusts the height of the rear suspension and consists of a hydraulic pump, a reservoir, two storage chambers and a body position corrector.
Hydraulic pump
The piston-type hydraulic pump is driven by a multi-groove auxiliary drive belt from the crankshaft.
Characteristic | Meaning |
| Working pressure at crankshaft speed of 900±100 min⁻¹, kgf/cm² | 130 |
| 125 |
| 160 |
Feed at n=1500 min⁻¹, l/min | 0,7 |
| Broadcast (engine/pump) | 0,667 |
Accumulation chambers
Each shock absorber receives working fluid from a separate storage chamber (pressure tank), in which the working fluid is under pressure, designed for its uniform and smooth supply to the shock absorbers.
Characteristic | Meaning |
Valve opening pressure, kgf.cm² | |
| 21—25 |
| 15,0 |
Body position corrector
The body position corrector, installed between the hydraulic pump and the storage chambers on the transverse stabilizer, determines the amount of pressure of the working fluid entering the shock absorbers through the storage chambers in order to maintain a constant height of the rear of the body.
Characteristic | Meaning |
| Opening pressure of the discharge valve, kgf/cm² | 30—36 |
Working fluid
Characteristic | Meaning |
Filling capacity of the hydraulic system of the leveling system, l | 3,5 |
Difference in fluid level between the "mini" and "maxi" marks on the dipstick, l | about 0.6 |
Liquid used | Aral Vitamol ZH-M or MB hydraulikol 000.989.9103 |
Frequency of checking oil with the engine running | every 20,000 km |
Rear wheel alignment angles
Characteristic | Meaning |
Collapse | from –0°20' to +0°20' |
Toe-in 0.5 mm | 0°20'—0°35' |
Rear wheel hubs
The rear wheel hub is mounted on a sealed radial thrust ball bearing.
Characteristic | Meaning |
Hub flange thickness, mm | 10,00 |
Runout of the supporting surface of the brake disc, no more than, mm | 0,02 |
| 0,12 |
Tightening torques of main threaded connections, kgf·m
Connection type | Meaning |
| Lower shock absorber support | 4,5 |
Fastening the anti-roll bar | |
| 1,9 |
| 3,0 |
Stabilizer connecting rod | |
| 4,5 |
| 3,0 |
Body position control system struts | |
| 3,0 |
| 4,5 |
| 1,9 |
| 6,5 |
| 4,2 |
| Body position control system pump | 1,2 |
| Body position control system corrector | 4,5 |
Front rear suspension mount | |
| 3,0 |
| 11,9 |
| Wheel drive shaft bolt | 3,0 |
| Wheel mounting bolt | 11,0 |
Rear axle
1 - main gear; 2 - parking brake cable; 3 - half shaft; 4 - brake disc; 5 - outer bearing; 6 - suspension spring; 7 - shock absorber; 8 - rear axle support beam; 9 - cardan shaft; 10 - stabilizer; 11 - diagonal lever