W114/W115
280E / 240D / 300D "Strich-Acht"
Overview
Known as the "Strich-Acht" (Stroke Eight) in Germany, the W114 (six-cylinder) and W115 (four-cylinder and diesel) were the mid-range workhorses that cemented Mercedes-Benz's reputation for legendary durability. The diesel variants — particularly the 240D and 300D — are famous for routinely reaching 500,000 miles and beyond. These cars are among the most robust automobiles ever manufactured.
Engines & Transmissions
Engine Options
- M114 2.8L I6
- M115 2.3L I4
- OM615 2.0L Diesel I4
- OM616 2.4L Diesel I4
- OM617 3.0L Diesel I5
Transmissions
- 4-speed manual
- 722.0/722.1 4-speed automatic
Common Problems
Known issues reported across the W114/W115 production run, ordered by severity. These are based on our direct experience servicing these vehicles over 35 years.
Rust in battery tray, wheel arches, and rocker panels
High severityVacuum system deterioration affecting climate controls and door locks
Medium severityBosch D-Jetronic fuel injection faults causing erratic idle (W114)
Medium severityAutomatic transmission governor issues causing harsh or delayed shifts
Medium severityMaintenance Highlights
Key service intervals for the W114/W115. These are based on our recommended schedule for Southern California driving conditions, which may differ from factory-specified intervals.
Reliability Assessment
Based on 35 years of service data at Beach Benz
Beach Benz Experience
“The Strich-Acht diesels are the cars that built the Mercedes-Benz legend of reliability. In 35 years of working on these, we have seen 240Ds and 300Ds with over 400,000 miles still running on original engines. The key is consistent valve adjustments and clean fuel. We stock OM616 and OM617 consumables and can turn around a full service in a day. If you want a car that will outlast everything else on the road, this is it.”
— Beach Benz service team · 35+ years of Mercedes-Benz specialization
Your W114/W115 deserves a specialist.
Factory diagnostics. OEM parts. 35 years of Mercedes-Benz expertise. Whether it's a routine service or a complex repair, Beach Benz has your W114/W115 280E / 240D / 300D "Strich-Acht" covered.