Mercedes-Oldtimer Ratgeber
W123 tachometer faulty? Needle jumps or stays p...
Needle at zero, an unsteady readout, or a stopped clock: here's how to narrow down the cause on the W123 tachometer – and which version really fits the four-cylinder petrol...
W123 tachometer faulty? Needle jumps or stays p...
Needle at zero, an unsteady readout, or a stopped clock: here's how to narrow down the cause on the W123 tachometer – and which version really fits the four-cylinder petrol...
W124/W201 A/C not cooling? Check the A/C relay
Compressor no longer engaging on the W124, 190 E, or G-Class? Often it's not the refrigerant circuit but the A/C relay A0025451205. Symptoms, check steps, and tested replacement.
W124/W201 A/C not cooling? Check the A/C relay
Compressor no longer engaging on the W124, 190 E, or G-Class? Often it's not the refrigerant circuit but the A/C relay A0025451205. Symptoms, check steps, and tested replacement.
W124/W201 turn signals not working? Check the t...
Turn signals or hazard warning lights not working in the W124, W201, W126, or W202? Here's how to systematically narrow it down to a bulb, fuse, or the turn signal...
W124/W201 turn signals not working? Check the t...
Turn signals or hazard warning lights not working in the W124, W201, W126, or W202? Here's how to systematically narrow it down to a bulb, fuse, or the turn signal...
W124 heater cold at idle? Check the auxiliary w...
If the heating in the Mercedes W124 only gets warm at higher engine speed and cools down again at idle, the electric auxiliary water pump on the duo valve is...
W124 heater cold at idle? Check the auxiliary w...
If the heating in the Mercedes W124 only gets warm at higher engine speed and cools down again at idle, the electric auxiliary water pump on the duo valve is...
W201 speedometer lighting flickering? Check pot...
Instrument lighting on the Mercedes 190 (W201) flickering or no longer adjustable? Usually the dimmer is to blame. Symptoms, 5 self-checks, and the refurbished original potentiometer 0005423925 in stock.
W201 speedometer lighting flickering? Check pot...
Instrument lighting on the Mercedes 190 (W201) flickering or no longer adjustable? Usually the dimmer is to blame. Symptoms, 5 self-checks, and the refurbished original potentiometer 0005423925 in stock.
ASD control unit defective? Testing & replaceme...
ASD warning light on, or the locking differential not working? Here's how to narrow down whether the ASD control unit is really defective – including tested genuine parts for W124,...
ASD control unit defective? Testing & replaceme...
ASD warning light on, or the locking differential not working? Here's how to narrow down whether the ASD control unit is really defective – including tested genuine parts for W124,...
Warm-up regulator W123 280E (M110) defective? T...
Poor cold start, over-enrichment or rough idle on the 280 with the M110 engine? Often the Bosch warm-up regulator 0438140057 needs replacing. Here's how to test and replace it.
Warm-up regulator W123 280E (M110) defective? T...
Poor cold start, over-enrichment or rough idle on the 280 with the M110 engine? Often the Bosch warm-up regulator 0438140057 needs replacing. Here's how to test and replace it.
W201 heater control panel defective? Check the ...
Blower only runs on the highest setting, or the temperature control has no effect? Here's how to distinguish the heater control panel from the coolant circuit on the Mercedes 190...
W201 heater control panel defective? Check the ...
Blower only runs on the highest setting, or the temperature control has no effect? Here's how to distinguish the heater control panel from the coolant circuit on the Mercedes 190...
W124/W201 ignition lock defective? Check & repl...
A jamming key, locked steering, or a starter that no longer turns: here's how to narrow down a defective ignition lock on the Mercedes W124 and W201 – and which...
W124/W201 ignition lock defective? Check & repl...
A jamming key, locked steering, or a starter that no longer turns: here's how to narrow down a defective ignition lock on the Mercedes W124 and W201 – and which...
Warm-up regulator W123 230 E: which suffix numb...
Three different warm-up regulators were fitted to the M102. Here's how to find out whether your W123 230 E, 230 CE, 230 TE or 230 GE needs the suffix number...
Warm-up regulator W123 230 E: which suffix numb...
Three different warm-up regulators were fitted to the M102. Here's how to find out whether your W123 230 E, 230 CE, 230 TE or 230 GE needs the suffix number...
Fuel pressure damper defective? Fuel at the lea...
Fuel dripping from the leak-off line on the fuel distributor and the cold engine running poorly? Then the diaphragm in the K-Jetronic fuel pressure damper has failed. Symptoms, a 5-step...
Fuel pressure damper defective? Fuel at the lea...
Fuel dripping from the leak-off line on the fuel distributor and the cold engine running poorly? Then the diaphragm in the K-Jetronic fuel pressure damper has failed. Symptoms, a 5-step...
Overvoltage protection relay faulty? Testing an...
Engine suddenly dies, idle surges, warning lights stay on? On the W107, W116, W123, W126 and W201, the overvoltage protection relay is often behind it – here's how to narrow...
Overvoltage protection relay faulty? Testing an...
Engine suddenly dies, idle surges, warning lights stay on? On the W107, W116, W123, W126 and W201, the overvoltage protection relay is often behind it – here's how to narrow...