Technical Help - 1985 - 2000 OPEN RESOURCE - no registration

Electronics arrive. M104 / M111 / M119. AMG factory cars. ABC suspension. The W124 / R129 / W126 late / W201 Cosworth / W140 era. Some are HVS-eligible. Some are nearly there.
Chassis covered: W124, W126 late, W201, R129, W140, W202 early (contested classic status under SMP §7.2)

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Sticky: W124 300CE-24 M104 - the actual service items that matter at 200,000 km Started by Vasilios_Billy, 24-06-2025 09:18 AM	21	5,418	24-06-2025 04:48 PM by Lefteris_IT
Sticky: W202 C36 AMG - is it classic yet - 30-year rule debate - serious technical discussion not just chat Started by Banksia_Park_Berny, 15-04-2025 11:18 AM	47	8,447	15-04-2025 06:18 PM by Lefteris_IT
Sticky: M104 wiring loom - biodegradable insulation - remediation walkthrough (with photos) Started by graham_v_neutral_bay, 07-04-2018 06:18 PM	87	24,618	08-04-2018 09:14 AM by Boonie_W108
W124 230E heater valve weeping again - 1989 - third time in 4 years - what gives Started by Banksia_Park_Berny, 24-06-2026 11:30 AM	14	1,847	24-06-2026 04:48 PM by Vasilios_Billy
W124 E320 Cabriolet hydraulic top - operates once then dies - is it the relay or the pump Started by Hugo_Darlinghurst, 11-04-2022 11:48 AM	13	1,864	19-04-2022 09:48 AM by Hugo_Darlinghurst
S124 wagon third-row rear-facing seat - the cushion has split - where to find replacement upholstery Started by Banksia_Park_Berny, 08-02-2018 02:48 PM	8	1,418	10-02-2018 09:48 AM by Banksia_Park_Berny
W126 560SEL airbag steering wheel module - SRS light intermittent - is it the module or the clockspring Started by Hugo_Darlinghurst, 06-09-2024 11:18 AM	10	2,418	07-09-2024 10:48 AM by Hugo_Darlinghurst
W201 2.3-16 Cosworth valve cover gasket - the leak is back - is there a known sealing technique Started by Andy_Scarr_Perth, 23-08-2023 03:48 PM	16	1,184	26-08-2023 01:04 PM by Andy_Scarr_Perth
W201 190E AMG body kit - real vs aftermarket - how to verify a factory AMG kit before buying Started by Cousin_Johnny_M, 31-03-2023 11:18 AM	13	3,418	06-04-2023 09:18 AM by Cousin_Johnny_M
R129 SL320 soft-top hood lock mechanism - will not release - mechanical override before the dealer Started by Chris_K, 19-08-2024 11:48 AM	11	2,118	20-08-2024 11:18 AM by Chris_K
R129 SL500 M119 - timing chain rattle at startup - 240k km - is this the chain or just the tensioner Started by Banksia_Park_Berny, 23-10-2023 04:18 PM	14	2,963	25-10-2023 09:18 AM by Banksia_Park_Berny
W140 S320 - ABC (Active Body Control) error code C1525 - is it the height sensor or the ride strut Started by Hugo_Darlinghurst, 12-05-2023 02:48 PM	9	1,847	22-05-2023 09:48 AM by Hugo_Darlinghurst
E55 AMG W210 - is this a classic yet - the 25-year line is approaching - Hugo/Vasilios reality check Started by Cousin_Johnny_M, 24-11-2024 04:48 PM	32	5,128	24-11-2024 09:48 PM by Cousin_Johnny_M
W124 wagon - self-levelling rear sagging - is it the spheres or the pump? Started by kosta_kos_again, 06-05-2023 09:14 AM	22	3,418	06-05-2023 03:30 PM by Con_K
M103 head gasket - 1989 300E - water in the oil at 248k - is it worth it Started by darren_h_punchbowl, 18-05-2021 11:48 AM	47	8,019	18-05-2021 06:42 PM by Boonie_W108
W126 climate control - centre vent not blowing cold - blend door servo diagnosis Started by rohan_m_castle_hill, 13-11-2025 11:48 AM	14	2,418	13-11-2025 06:18 PM by rohan_m_castle_hill
R129 hydraulic top - stops half-way - reservoir level OK - pump pressure question Started by henry_m_mosman, 09-01-2023 11:18 AM	18	1,063	09-01-2023 07:42 PM by henry_m_mosman

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