The above link includes:
* Diesel starter is shown/used in that link. Diesel starters contain reduction gear sets and are larger and heavier than gasoline starters.
Causes and remedies:
"Engine will not turn over." Turn over, in the car world, means to crank. When describing a no start issue, "will not turn over" is an indication to experts that the engine is not cranking. Because specifics are better, it's wiser to say that "the engine will crank, but not start".
Is it a starting issue, or a running issue? If the car starts and runs, albeit poorly, it does not have a starting problem; the car has a running issue. For troubleshooting, visit the engine and/or fuel system pages.
For complete diagnostic procedures for all of the above, please refer to your Bentley Service Manual (or other repair manual).
Is it an automatic? Automatic Cabriolets are notorious for this problem due to the poorly-located starter (next to the exhaust manifold). The best solution for this problem is to install a hot-start relay. Also, be sure that the heat-shield is in place.
Bosch is still making decent wires, so they are still recommended. However, NGK is now making a set of plug wires for these cars, which are also recommended (#VWC013, or NGK57283).
Firing order: 1-3-4-2
|1981 - Oct. 1984||JH, EN|
|Nov. 1984 - Sep. 1986||JH|
|Distributor Cap||Bosch 03214||Oct. 1986 - 1989||JH|
|1990 - 1993||2H|
|Rotor||Bosch 04038||1981 - 1989||JH, EN
14mm distributor shaft
||1990 - 1993||2H
10mm distributor shaft
|Distributor||026-905-205L1||up to Oct. 1984||JH
to engine #140000
|Distributor||026-905-206B2||Oct. 1984 - Oct. 1987||JH
engine #140000 to 280000
|Distributor||026-905-205AH2||Oct. 1987 - Apr. 1993||JH
from engine #280001
up to L-12000
L-12001 to M-21000
|Hall Sender||035-998-065||1980 - 1983||EJ, EN|
|1984 - 1993||JH, 2H|
1 Replacement distributor is 026-905-205L
2 Replacement distributor is 026-905-237X
3 Replacement distributor is 037-905-237X
|Pin||K-Jetronic Function||Digifant Function||Wire Color|
|1||Terminal 1 on coil||Terminal 1 on coil||K-Jetronic: Green
|3||Terminal 1 on Hall generator
|4||Terminal 15 on coil||Terminal 15 on coil||Black|
|5||Terminal 3 on Hall generator
|6||Terminal 2 on Hall generator||Terminal 25 on Digifant ECU||K-Jetronic: Green/White
Also known as the "X" circuit, the load reduction circuit is exactly that: It is the circuit that reduces the load on the ignition system during cranking by cutting power to high-load accessories. These accessories include the headlights, the HVAC system, windshield wipers, and rear window defroster.
More thorough explanation and troubleshooting can be found at this link.
North American Cabriolets were originally equipped with Group 41 lead acid batteries. These are now becoming harder to find in some regions, but there are other options available; refer to the guide below.